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Flash Plugin - Keep it up to date and troubleshoot problems

The Adobe Flash Player browser plugin lets you view video and animated content in Firefox. This article has information about testing, installing, updating, uninstalling and troubleshooting the Adobe Flash plugin.

Note: The Firefox Software Update feature does not update installed plugins. See the Adobe Security bulletins and advisories page for information about security and stability issues affecting Adobe Flash Player and other Adobe products.

Testing Flash

Visit Adobe's test page to see if the Flash plugin is installed and working properly. If it tells you that Flash is not installed, see the article Install the Flash plugin to view videos, animations and games or see the next section on how to install the latest Flash plugin.

Installing or updating Flash

The Flash plugin automatically updates itself by default. If Mozilla's Plugin Check page or Adobe's test page says that Flash is outdated and you don't want to wait for the automatic update, you can update Flash manually by downloading and installing the latest version from Adobe.

To check if your installation of Flash is up to date, visit Mozilla's Plugin Check page. If it says that Flash is outdated, you can update Flash by downloading and installing the latest version from Adobe.

  1. Go to Adobe's Flash Player download page and download the Flash installer.
    Caution: Adobe's download page may include a checkbox for optional software (such as Google Chrome or McAfee Security Scan) that is selected by default. If you do not clear the checkbox before downloading, that software will be installed on your computer when you open the Flash installer.
  2. When the download has finished, close Firefox. Click the menu button New Fx Menu and then click ExitQuit Close 29 .
  3. Open the Flash installer file you downloaded and follow the instructions.
Note: If you are having problems with the Flash installer from Adobe's download page, you can use this Flash Player installer link to directly download the full installer.
  1. Go to Adobe's Flash Player download page and download the Flash installer.
  2. Click the menu button New Fx Menu and then click ExitQuit Close 29 .
  3. Open the file you downloaded (i.e. install_flash_player_osx_intel.dmg).
  4. In the Finder, open the Install Adobe Flash Player.app to run the installer, then follow the installer's instructions.
  1. Go to Adobe's Flash Player download page.
  2. When prompted, save the file (i.e. install_flash_player_"version"_linux."processor".tar.gz).
  3. Click the menu button New Fx Menu and then click ExitQuit Close 29 .
  4. Open a Terminal window (in Gnome, click on the Applications menu, select Accessories, and then select Terminal.)
  5. In the Terminal window, change to the directory where you saved the file you downloaded (e.g. cd /home/user/Downloads).
  6. Extract libflashplayer.so from the file you downloaded with the command tar -zxvf install_flash_player_"version"_linux."processor".tar.gz.
  7. As the super user, copy the extracted file, libflashplayer.so, to your Firefox installation directory's plugins sub-directory. For example, if Firefox is installed in /usr/lib/mozilla, use the command sudo cp libflashplayer.so /usr/lib/mozilla/plugins and then enter your super user password when prompted.

    0a85171f1802a3b0d9f46ffb997ddc02-1260326970-447-1.png

Uninstalling Flash

For instructions on uninstalling Flash, see Adobe's help page, Uninstall Flash Player - WindowsUninstall Flash Player - Mac OS.

Note: Running Adobe's uninstaller will remove Flash from all browsers where it is not built-in, including Internet Explorer. You will be prompted to reinstall Flash when you visit a page that requires it, such as Adobe's test page.

Troubleshooting

Flash plugin not working

If Adobe's test page does not show that Flash is working even though you have installed the latest version, your Flash plugin may be disabled. To make sure that Flash is enabled,

  1. Click the menu button New Fx Menu and choose Add-ons. The Add-ons Manager tab will open.

  2. In the Add-ons Manager tab, select the Plugins panel.

If the Flash plugin is disabled, select Always Activate in its drop-down menu.

Flash works in Internet Explorer or Chrome but not in Firefox

There are three different types of Flash Players: an ActiveX version for Internet Explorer, a Chrome version built-in the browser and a plugin version for Firefox and some other browsers. If you want Flash to work in Firefox you must install the plugin version, as explained above.

"Activate Adobe Flash" prompts

If you see an "Activate Adobe Flash" prompt instead of Flash content, either you have set the Flash plugin to "Ask to Activate" in the Add-ons manager or Firefox has prevented an unsafe Flash version from running automatically. Click on the "Activate Adobe Flash" message to allow the Flash content to load (if it doesn't, reload the page and try again). For more information, see the articles Set Adobe Flash to "click to play" on Firefox and Why do I have to click to activate plugins?.

The Adobe Flash plugin has crashed

If you see this message instead of Flash content, see Adobe Flash plugin has crashed - Prevent it from happening again and Adobe Flash protected mode in Firefox.

Unresponsive plugin warning

Firefox will show you a warning dialog if the Flash plugin is taking longer than expected:

warning-unresponsive-plugin

See the article Warning Unresponsive plugin - What it means and how to fix it for solutions and workarounds.

Cannot view full screen Flash videos

See Flash videos won't play full screen.

Playing Flash videos makes Firefox hang

If Firefox stops responding or if the Flash plugin hangs or stops working when playing Flash videos or games, try these solutions:

Other Flash problems and solutions

  • If Flash content does not work, acts strangely, causes errors, or if you see a notice that you need to update Flash (for instance, at Mozilla's Plugin Check) even after installing the latest Flash version, uninstall and reinstall Flash.



Based on information from Flash (mozillaZine KB)

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Comments

Copied from the post, "Firefox hangs on flash" in the Troubleshooting plugins discussion forum:


After 6 month searching I found the solution to my problem: Firefox 4.0.1 is hanging on flash ( in youtube for instance ) due to hardware acceleration of the flash display. To turn it off see: http://www.macromedia.com/support/documentation/en/flashplayer/help/help01.html


My reply:
Thank you for reporting a possible solution for problems with the Flash plugin, which is to disable hardware acceleration in the Flash Player settings as documented at http://www.macromedia.com/support/documentation/en/flashplayer/help/help01.html

I checked the Firefox hangs or is not responding - How to fix article and it does refer you to the Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems article for problems caused by plugins. Since you have identified Flash as the plugin causing the problem, the next step would have been to research Flash articles. <snip>

The Flash Plugin - Keep it up to date and troubleshoot problems article has a troubleshooting section that links to Flash videos won't play full screen which has "Disable hardware acceleration" in Flash settings as the solution. I think that the Flash Plugin - Keep it up to date and troubleshoot problems article's troubleshooting section should mention that other performance issues caused by Flash can also be solved by disabling hardware acceleration. I'll copy this to that article's discussion forum.


I think that the Troubleshooting section in this article should mention that disabling hardware acceleration in Flash settings, which is the Flash videos won't play full screen solution, can also resolve hangs and other performance issues when using Flash.

See /forums/knowledge-base-articles/694832 for related discussion about this article.

For discussion about the Template:updateflash used in this article, see /forums/knowledge-base-articles/704958.

I added a section about Flash HW accel. that may makes Firefox hang, sorted troubleshooting sections by commonness, removed duplicated keywords. It needs review.

I approved it.

I deleted my original post in this thread.

There is now a revision to the Template:updateflash template used in this article and a discussion thread here: /en-US/kb/templateupdateflash/discuss/1912

under Uninstalling Flash, this article includes a note that says,


Note: Running Adobe's uninstaller will remove Flash from all browsers where it is not built-in, including Internet Explorer. You will be prompted to reinstall Flash when you visit a page that requires it, such as Adobe's Test Page.


While better than nothing, that note may not be enough, since some users may run into problems with RealPlayer or other installed software that needs to have the Adobe Flash Player ActiveX installed to work properly, even though they don't use Internet Explorer. Why not suggest uninstalling just the Adobe Flash Player Plugin using Windows Control Panel, while leaving the ActiveX installed?

This related discussion has more detail and reference links:

The "Flash does not work properly and/or will not update" bit of the article seems more like a statement instead of provide help.

May I ask what suggestions you have to improve this, and what part you do not like. Flashplayer is an important but rather troublesome plugin. So if you think the article is confusing or ambiguous perhaps you can explain more.

The heading

Flash does not work properly and/or will not update

Will be intended as a description of the symptom, i.e. what the user is seeing as a problem that needs solving. Other nearby headings may also be seen as statements. Statements of the problem.

Or is the content something you would like to change.
If Flash content does not work, acts strangely, or causes errors, or if you see a notice that you need to update Flash (e.g., at Mozilla's Plugin Check) even after installing the latest Flash version, uninstall and reinstall Flash.2

For example I can imagine some absolute novices may have a problem with the concept of inline links, but any such users would probably not be attempting to troubleshoot problems, or find KB articles anyway. Such a user would consult someone else, maybe whoever installed Firefox and Flashplayer for them.

It's the content part. I suggest it be changed, but changed to what is my question.

The instructions under the "Playing Flash videos makes Firefox hang" section say:

  • Disable HW acceleration in Flash:
    1. Go to this Flash help page on adobe.com.
    2. {for win,linux}Right-click on the box that lists your Flash player version and then click {menu Settings…} in the context menu.{/for}{for mac}Hold down the {key Ctrl} key while you click on the box that lists your Flash player version and then click {menu Settings…} in the context menu.{/for} The Adobe Flash Player Settings screen will open.

That Flash help page no longer has a box that lists your Flash player version. The "Check now" box, when clicked, only shows me (on Win7) Congratulations, your computer has the latest Flash Player installed.. Right-clicking that box, the "Settings" item is greyed-out (only the "Global Settings" item is clickable but that doesn't include the needed option).

The box with the "Settings" option that needs to be clicked is the one with the Flash animation, at the bottom of the page.

I made a revision to change the instructions for that page. An alternate page that might be better is http://helpx.adobe.com/flash-player/kb/video-playback-issues.html#main_Solve_video_playback_issues which is the Adobe help page listed in http://kb.mozillazine.org/Flash#Performance_or_display_issues_with_certain_Flash_videos

For the record, the latest version of Flash is still causing the current version of Firefox to hang, as reported here:

http://forums.adobe.com/message/5808165 Firefox 25 on Windows 7: Flash 11.9.900.117 freezes Firefox

Note: On Windows, you can also disable hardware acceleration by adding the line DisableHardwareAcceleration=1 to the Flash "mms.cfg" file, as suggested in the above thread. The mms.cfg file is located here:

(Windows 32bit) C:\Windows\System32\Macromed\Flash
(Windows 64bit) C:\Windows\SysWOW64\Macromed\Flash

I made an edit to the section on disabling HW acceleration to use the same Adobe Help page as the Adobe Flash plugin has crashed - Prevent it from happening again article uses: http://helpx.adobe.com/flash-player/kb/video-playback-issues.html#main_Solve_video_playback_issues

I also added a missing {/for} that I left off my previous revision.

I added "Disable protected mode in Flash" (for Windows Vista and above) based on this post by jscher2000 dated 6/23/13 in /questions/962798 Flash hangs Firefox (eventually get script continue/stop dialog)

After some overdue Windows updates, I got hit with severe hangs when opening any page with Flash media. The window frame controls (e.g., minimize) still worked, but everything inside was inaccessible for minutes at a time. Then I would get a dialog indicating that a script was running slowly and had the opportunity to stop or continue.

I had already disabled hardware graphics acceleration in Firefox and Flash, so the logical next step was to disable the Flash Player's protected mode. That is described in this support article from Adobe under the heading "Last Resort": Adobe Forums: How do I troubleshoot Flash Player's protected mode for Firefox?

It worked.

Under the Troubleshooting section I added a new "Flash plugin not working" section based on the following:

Posted today by jscher2000:


If Firefox previously disabled Flash because it was an old, vulnerable version, you might need to manually re-enable it after updating. You can do that on the Add-ons page. Either:
   Ctrl+Shift+a
   orange Firefox button (or Tools menu) > Add-ons 
In the left column, click Plugins. Then look for Shockwave Flash toward the bottom and change its status from "Never Activate" to your choice of "Always Activate" or "Ask to Activate".

I approved my Dec 27, 2013 revision but I haven't marked it ready to localize.

I was thinking that since Firefox 28 is now in Beta we should mention for Windows 8 and Fx 28 that Flash (and other plugins) only work in desktop mode. I've added this article to the "Need changes" list.

Ref: /questions/985810 Testing "touch friendly" version of firefox - is flash supported? Can see Flash in desktop mode but not in Metro mode.

Question: 
In Metro mode it keeps asking to install Flash player. 
Solution (philipp) Posted 2/8/14
hello daniellung, no the firefox for windows touch version doesn't support content that uses plugins to display currently. see bug 738600 for reference.

Edit: I added the following note to the top of the article (pending review)

{for win8, fx28}{note}You will not be able to use the Flash plugin in Firefox for Windows 8 Touch (Metro mode). As with all plugins, the Flash plugin only works in desktop mode. {/note}{/for}

Any other ideas? Maybe a template with content similar to the following could be added to all plugin articles?

{for win8, fx28}{note}Plugins are not supported in Firefox for Windows 8 Touch (Metro mode). If a webpage prompts you to download and install a plugin, switch to desktop mode. {/note}{/for}


Should a note be added to this article for Win 8, Fx 28 and above, that the Flash plugin only works in desktop mode? Firefox Beta was just released and this question came up in the support forum:

/questions/985810 Testing "touch friendly" version of firefox - is flash supported? Can see Flash in desktop mode but not in Metro mode.

In Metro mode it keeps asking to install Flash player. 

("Solution") Posted 2/8/14 by philipp:

hello daniellung, no the firefox for windows touch version doesn't support content that uses plugins to display currently. see bug 738600 for reference.

Related bugs:

Bug 738600 - [Tracking] Plugin support in metrofx

Matt Brubeck (:mbrubeck) 2013-11-12 11:39:14 PST
For the record, we hoped to support plugins in Metro, but we haven't found a feasible way to do it.  We disabled plugins in bug 789600 because existing NPAPI plugins are not compatible with the Metro environment, and we have not been able to get plugin makers to provide versions of their plugins that do work with Firefox for Metro.  Bug 806536 has some of the technical details.
(For comparison: Chrome and IE both have limited support for plugins in Metro.  They support special versions of Flash, but no other plugins.)

Bug 936907 - On a page with plugins, automatically prompt the user to switch to desktop

Matt Brubeck (:mbrubeck) 2013-11-10 08:56:56 PST
Firefox for Metro cannot support plugins for technical reasons.  Based on the large number of bugs filed (e.g. bug 738600 and duplicates, as well as others), this is one of the biggest user pain points in the current version.  Barring a complete solution, we should at least mitigate the pain.
Currently, pages that require plugins will usually prompt the Metro Firefox user to download and install a plugin.  After the user follows the instructions, the page still won't work.  Metro Firefox doesn't do anything to help inform the user that they need desktop Firefox to use any installed plugins.

Matt Brubeck (:mbrubeck) 2014-02-03 13:59:36 PST
I wonder if Shumway (bug 904346) could be used as a way to play Flash content in Metro, with a "switch to desktop" prompt as a fallback for content that fails with Shumway...

Bug 904346 - (shumway) [meta] add built-in SWF support to Firefox with Shumway


Bug 967306 - (metro-shumway) Use Shumway to display Flash content in Metro Firefox

Matt Brubeck (:mbrubeck) 2014-02-03 16:22:18 PST
This bug will track the work required to ship Shumway (see bug 904346) enabled by default in Firefox for Windows 8 Touch (a.k.a. "Metro").
Metro Firefox is a particularly good use case for Shumway, since it can't support NPAPI flash for technical reasons (see bug 738600).

See /forums/contributors/710085 Firefox for Windows 8 Metro

Since the Metro (Touch) version of Firefox will not be released I've removed the note.

AliceWyman said

See /forums/contributors/710085 Firefox for Windows 8 Metro Since the Metro (Touch) version of Firefox will not be released I've removed the note.


Correct decision, reviewed, approved, ready to localize.

Thanks.

In a pending revision, I added {for fx35} around the link to Install the Flash plugin to view videos, animations and games that's currently at the top of this article. Flash installation instructions are the same as for updating flash, now that the Plugin Finder Service is gone. Related discussion: /en-US/kb/install-flash-plugin-view-v.../5534 [Fx35] Plugin Finder Service is going way

I also mentioned Flash automatic updates for Windows and Mac. Adobe's "Silent Update" feature was introduced in Flash Player 11.2 on Windows and in 11.3 on Mac OS X. Ref: http://blogs.adobe.com/security/2012/03/an-update-for-the-flash-player-updater.html http://www.ghacks.net/2011/11/01/flash-player-11-2-introduces-automatic-updates/ http://www.intego.com/mac-security-blog/adobe-updates-flash-adds-silent-updating/

Starting in Firefox 35, you can disable Flash Protected Mode by setting the dom.ipc.plugins.flash.disable-protected-mode preference to true in about:config and restarting the browser (bug 1108035). To re-enable Flash Protected Mode, reset the preference back to the default "false" value. At time of writing, however, this option does not work on Windows 8. https://bugzilla.mozilla.org/show_bug.cgi?id=1112709 http://www.ghacks.net/2014/12/21/how-to-disable-flash-player-protecte...

I just added the above to MozillaZine's Flash article section on disabling Protected Mode in Flash and thought it should be added to this article.

P.S. The Troubleshooting section, "Playing Flash videos makes Firefox hang" currently has the following:

{for win7, win8}

{/for}

The above would need updating to add {for win7} steps to set the dom.ipc.plugins.flash.disable-protected-mode preference to true in about:config. Adobe's "Last Resort" method would be for win8 only. [*]

[*]Note: The related Windows 8 bug (bug 1112709) is marked fixed in mozilla37 so a future update would be needed to add the about:config steps for win8.

AliceWyman said

I just added the above to MozillaZine's Flash article section on disabling Protected Mode in Flash and thought it should be added to this article.

Done Alice

I've been meaning to get to this!

Thanks for updating the article for fx35 with instructions for win7 to disable Flash protected mode with the new preference.

I made some other edits to the article and marked it ready to localize and I set up a "Need changes" entry to review for win8.

AliceWyman said

[*]Note: The related Windows 8 bug (bug 1112709) is marked fixed in mozilla37 so a future update would be needed to add the about:config steps for win8.

The Windows 8 bug 1112709 is now marked status-firefox36: affected → fixed in [https://bugzilla.mozilla.org/show_bug.cgi?id=1112709#c13 comment 13 posted today, so I updated the thread title and the need changes entry to review for fx36.

Update: bug 1112709 was reopened, then closed again. The new bug tracking the Windows 8 issue is bug 1121829.


https://bugzilla.mozilla.org/show_bug.cgi?id=1121829#c2

Benjamin Smedberg [:bsmedberg] 2015-01-15 10:57:03 PST
As a continuation of bug 1112709, this means the Flash protected-mode hook doesn't work yet  on Windows 8.1.
Blocks: 1112709
tracking-firefox36: --- → +
status-firefox36: --- → affected
tracking-firefox37: --- → +
status-firefox37: --- → affected

We have to keep an eye on this before showing the about:config steps for win8.

Another bug to watch is this one:

Bug 1119941 - Test: disable Flash protected mode


Benjamin Smedberg [:bsmedberg] 2015-01-09 12:49:36 PST
The results of bug 1111791 indicate that Flash protected mode doubles or more the rate of Flash crashes and hangs for Firefox users. In order to validate that experiment against a larger audience and also get better crash-stats, we intend to disable protected mode by default up to beta.
Flash problems are one of the major reasons people are stopping using Firefox. This change is definitely trading off security for better functionality, which is a tough call, but it's something we're going to try on beta.
No decision has been made yet about rolling this out to release users.

It looks like there's a plan to turn off Flash Protected Mode in Firefox by default in future beta/aurora/nightly versions.

AliceWyman said

Another bug to watch is this one: Bug 1119941 - Test: disable Flash protected mode <snip> It looks like there's a plan to turn off Flash Protected Mode in Firefox by default in future beta/aurora/nightly versions.

Bug 1119941 is now Resolved-Fixed (currently, in firefox38) Edit: Flash Protected Mode is now disabled by default on Firefox 36 Beta 5 (bug 1119941#c12) but will not be part of the final Firefox 36 release according to this QMO post. Related bug to watch:

  • Bug 1120993 - Decision: whether to continue bug 1119941 (Flash protected-mode disablement) into release

See Bug 1119941 - Test: disable Flash protected mode There's a plan to turn off Flash Protected Mode in Firefox by default in future beta/aurora/nightly versions and eventually in an upcoming Firefox release. This article will need updating for Windows (currently win7) when this happens.

Related bug to watch:

  • Bug 1120993 - Decision: whether to continue bug 1119941 (Flash protected-mode disablement) into release

AliceWyman said

The new bug tracking the Windows 8 issue is bug 1121829.

This bug is now fixed in Firefox 36 so we can add the steps to disable Flash protected mode for win8:


https://bugzilla.mozilla.org/show_bug.cgi?id=1121829#c20

Andrei Vaida, QA [:avaida] 2015-01-27 05:52:42 PST
Verified fixed on Firefox 36.0b4 (build1: 20150126151838) and Aurora 37.0a2 (2015-01-26), using:
- Windows 8.1 32 bit,
- Windows 8.1 64 bit (Surface Pro 2), 
with Shockwave Flash 16.0 r0 (16.0.0.296).
Status: RESOLVED → VERIFIED
status-firefox36: fixed → verified
status-firefox37: fixed → verified

Flash Protected Mode is now disabled by default in Firefox Beta (the default dom.ipc.plugins.flash.disable-protected-mode setting is now "true"). This is only for testing, though. It won't be disabled by default in Firefox 36 release according to this QMO post (linked from the 36.0 beta release notes) and bug 1120993 is still open.

In other words, we can continue to recommend disabling Protected Mode for Flash issues and add that suggestion for Windows 8.

I made a new revision to edit the last section under Troubleshooting, "Flash does not work properly and/or will not update", and renamed it "Other Flash problems and solutions".

In addition to the win/mac suggestion, I added links to Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and to Fix common audio and video issues for general audio/video issues. This came up in the KB discussion forum, where a Firefox extension was causing Flash not to work:

Note that both the DisableHWAflash and closefirefox templates in this and the Adobe Flash plugin has crashed - Prevent it from happening again article do not really suffer from inserted spaces but inserted line feeds for some reason, like the optionspreferences template did. I’ve added another comment in bug 720228 hoping to get an explanation to why some (!) templates suffer from this, and if at least that part could be prevented or solved. Needless to say this keeps delivering some KB issues and annoyances even after fixing the optionspreferences issue. If it can’t be solved, we should take this into account.

If it was up to me (though it may seem a bit picky), I’d prevent using templates in any part of a sentence for the time being. Also note that some locales (like ours) may not allow including words starting with a capital letter when they follow a colon (:) so sentences like "Close Firefox: [template content]" may cause trouble. Both issues would currently need us to use the template’s content instead to prevent a line jump and show proper grammar.

I made a minor edit to the article ... and to the Adobe Flash plugin has crashed - Prevent it from happening again article. Could you review, to see if it helps at all?

The line break before the Template:DisableHWAflash content is what I want since it's a numbered list. I added a <br> before [[T:DisableHWAflash]] anyway, just to make it clear that I want a line break.

I removed the colon after "Close Firefox". I agree that the line break before the Template:closeFirefox content is a problem.

Tonnes said

Note that both the DisableHWAflash and closefirefox templates in this and the Adobe Flash plugin has crashed - Prevent it from happening again article do not really suffer from inserted spaces but inserted line feeds for some reason, <snip> Also note that some locales (like ours) may not allow including words starting with a capital letter when they follow a colon (:) so sentences like "Close Firefox: [template content]" may cause trouble.

Clear… It doesn’t look like the 'br' makes any difference around the DisableHWAflash template - visually that is. As far as I know a single br is pretty much ignored unless used twice (resulting in a new line), or just once when following a line that contains an inline image at the end. (Now we’re at it: the latter is only true in localized previews, not en-US, so I sometimes add them just to get a right preview to match the en-US view. ;) )

The closeFirefox template is what worries me more in this case. Even without the capitalization issue, the line feed just makes it look odd (like with optionsPreferences, not closeOptionsPreferences). I sure hope this can be fixed some day.

I forgot to mention that these line feeds were actually inserted after optionsPreferences, but before closeFirefox. Either way, there must be an explanation, but the question is why some templates do and others do not suffer from it.

I added a new section under Troubleshooting: "Activate Adobe Flash" prompts and linked to the related articles.

There is an assigned bug to disable Flash Protected Mode when a Flash hang occurs (1133003) and another assigned bug (1133000) to enable users to toggle the setting to disable Flash Protected Mode from the Firefox UI. This leads me to think that Flash Protected Mode won't be disabled by default any time soon.

(I also posted about this in the Adobe Flash plugin has crashed - Prevent it from happening again article discussion.)

There will be a new UI to disable Flash Protected Mode in Firefox 38. I set up a "Needs change" entry to update this article. Related bug: Bug 1133000 - Expose the protected-mode toggle in the Firefox UI

The setting is a checkbox accessible from the Add-ons Manager Plugins panel, by clicking the "More" link in the Shockwave Flash entry. Here's the screenshot attached to the bug: [*]

. [*] Note: The above screenshot is outdated. The name of the setting will be "Enable Adobe Flash protected mode" and it's checked by default.

The bug report indicates that there will also be a "Learn More" link (not currently shown in the screenshot):

Madhava Enros [:madhava] 2015-02-20 09:28:26 PST
Also - can we strike the grey explanatory text and replace it with a "Learn More" link to the same content we use from the infobar? The trade-off needs more context in its explanation, and that's what we're providing on the Learn More page.

The link will go to https://support.mozilla.org/en-US/kb/flash-protected-mode-settings (the page doesn't exist yet but I'm assuming Joni will be involved).

P.S. This bug was also fixed for Firefox 38: Bug 1133003 - When users experience a Flash plugin hang, turn off Flash protected mode

"The Adobe Flash Player has crashed" message will also include a "Learn More" link, as shown in this screenshot attached to the bug.

AliceWyman said

P.S. This bug was also fixed for Firefox 38: Bug 1133003 - When users experience a Flash plugin hang, turn off Flash protected mode "The Adobe Flash Player has crashed" message will also include a "Learn More" link, as shown in this screenshot attached to the bug.

Bug 1133003 was changed from FIXED to WONTFIX but the Add-ons manager will still contain a checkbox to disable Flash Protected Mode. See this related SuMo "KB content" bug: Bug 1147877 - Need a KB article for the Flash protected-mode checkbox


April 2, 2015: edited to remove horizontal scrollbars. aw

Description Benjamin Smedberg [:bsmedberg] 2015-03-26 07:01:51 PDT

Starting in Firefox 38 in the Firefox desktop UI there will be an option in the addons manager:

"Enable Adobe Flash protected mode" [X] _Learn More_

(This is from bug 1133000).

The learn-more link goes to https://support.mozilla.org/en-US/kb/flash-protected-mode-settings

Here are the things we want to convey in the article:

  • Protected mode is a Windows-only security feature implemented by Adobe Flash. It is on by default.
  • For a small set of users, this feature may cause persistent Flash hangs or crashes. This is especially true for the following users:
    • Users on a Windows touchscreen
    • Users who use accessibility tools
  • Because this is disabling a security protection, only users who are affected by poor Flash performance should disable this feature.

I'll change the note in this article and in the Adobe Flash plugin has crashed - Prevent it from happening again article to include a warning, that disabling Flash Protected mode will reduce security protection.

Since Flash Protected Mode will no longer be disabled by default in an upcoming release I replaced the note with a warning. Related discussion: /en-US/kb/keep-flash-up-to-date-and-t.../5970

I made a new revision to update this article for fx38 with the steps to disable Adobe Flash protected from the new Add-ons manager UI, by removing the check mark from "Enable Adobe Flash protected mode".

Here's a screenshot I just uploaded but didn't include in my last revision: Fx38-UI-AdobeFlash-protected-mode [[Image:Fx38-UI-AdobeFlash-protected-mode]]

I made a new revision in which I removed the steps to disable Flash protected mode and added a link to the instructions in another article, Adobe Flash plugin has crashed - Prevent it from happening again. We update that section a lot and it will be much easier for editors and localizers if we don't always have to update instructions in both articles. Users get exactly the same instructions in the Adobe Flash plugin has crashed - Prevent it from happening again article.

It's been a pain to keep updating both articles as well as the related discussion threads! My other thought was to create a template to use in both articles but your solution is better.

Now that we have a new article on how to disable Flash protected mode in Firefox 38, I made another edit based on your revision, to link to the Adobe Flash protected mode in Firefox article for fx38 and above. What do you think?

If you agree, I'll change the Adobe Flash plugin has crashed - Prevent it from happening again article to also link to the Adobe Flash protected mode in Firefox article for fx38 and above.

AliceWyman said

If you agree, I'll change the Adobe Flash plugin has crashed - Prevent it from happening again article to also link to the Adobe Flash protected mode in Firefox article for fx38 and above.

On second thought, I think we should just link to Adobe Flash protected mode in Firefox in this article for fx 38. I think we should keep the Adobe Flash plugin has crashed - Prevent it from happening again article as it is, so that it gives complete instructions without having to click on a link.

AliceWyman said

I think we should keep the Adobe Flash plugin has crashed - Prevent it from happening again article as it is, so that it gives complete instructions without having to click on a link.

I made an edit to that article's "Disable Flash protected mode" section to add that Flash protected mode can cause hangs or plugin crashes for some users, for the benefit of those users linked there from this article's section on hangs.

I also added a "Learn More…" link to Adobe Flash protected mode in Firefox for fx38 (under the screenshot) but I kept the complete instructions to disable Flash protected mode.

I updated this article's Troubleshooting section to include links to Adobe Flash protected mode in Firefox for hangs and plugin crashes in Windows Vista and above, since that article now includes instructions for fx37 and below as well as for fx38.

I added a second link to Adobe Flash protected mode in Firefox {for win7,win8} in the "The Adobe Flash plugin has crashed" section, since the Adobe Flash plugin has crashed - Prevent it from happening again article's "Disable Flash protected mode" section doesn't show up in the collapsed headings due to bug 1142285.

Related discussion:

The "Testing Flash" section was recently revised, from follow the instructions in the Updating Flash section below to install the Flash plugin. to see the next section on how to install the latest Flash plugin.

Since the "next section" is currently named "Updating Flash", I renamed it "Installing or updating Flash".

P.S. My revision is pending review.