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New add-on does not appear in toolbar (or toolbar items list)

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I have Firefox 68.0.1 on Linux Mint 18.2. I recently added Easy Youtube Downloader Express from addons.mozilla.org, but despite appearing on the list of addons as enabled, the new extension does not appear in my toolbar or on the list of items to include in the toolbar when I click on customize. I have closed and restarted both firefox and my machine, and removed and reinstalled the addon but none of this has helped.

I have Firefox 68.0.1 on Linux Mint 18.2. I recently added Easy Youtube Downloader Express from addons.mozilla.org, but despite appearing on the list of addons as enabled, the new extension does not appear in my toolbar or on the list of items to include in the toolbar when I click on customize. I have closed and restarted both firefox and my machine, and removed and reinstalled the addon but none of this has helped.

Chosen solution

After searching in some obscure page, I found the answer. Apparently this is the only downloader addon that does not create an icon. Sorry for the trouble and thanks a ton for the help.

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Additional System Details

Installed Plug-ins

  • Shockwave Flash 30.0 r0

Application

  • User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0

More Information

FredMcD
  • Top 10 Contributor
4250 solutions 59444 answers

Have you checked the overflow?


Separate Security Issue: Update your Flash Player or remove it using these links; Uninstall Flash Player | Windows {web link} Uninstall Flash Player | Mac {web link}

Note: Windows users should download the ActiveX for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).

Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the ActiveX.

Flash Player Version 32.0.0.223

https://get.adobe.com/flashplayer/ Direct link scans current system and browser Note: Other software is offered in the download. <Windows Only>

https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download. <Windows Only> +++++++++++++++++++ See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

Have you checked the overflow? ---------------- '''Separate Security Issue:''' Update your Flash Player or remove it using these links; [http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html Uninstall Flash Player | Windows] {web link} [http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-mac-os.html Uninstall Flash Player | Mac] {web link} '''Note: Windows users''' should download the '''ActiveX''' for ''Internet Explorer.'' '''and''' the '''plugin''' for ''Plugin-based browsers'' (like Firefox). '''Note: Windows 8 and Windows 10''' have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the ActiveX. Flash Player '''Version 32.0.0.223 ''' https://get.adobe.com/flashplayer/ Direct link scans current system and browser '''Note: Other software''' is offered in the download. <Windows Only> https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) '''Note: Other software''' is offered in the download. <Windows Only> +++++++++++++++++++ See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration
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Question owner

FredMcD said

Have you checked the overflow?

Separate Security Issue: Update your Flash Player or remove it using these links; Uninstall Flash Player | Windows {web link} Uninstall Flash Player | Mac {web link}

Note: Windows users should download the ActiveX for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).

Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the ActiveX.

Flash Player Version 32.0.0.223

https://get.adobe.com/flashplayer/ Direct link scans current system and browser Note: Other software is offered in the download. <Windows Only>

https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download. <Windows Only> +++++++++++++++++++ See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

Thanks for the reply. It is my understanding that Adobe no longer develops the flash player for firefox running on Linux. What I have is Shockwave Flash. I can watch videos with no problems and use other download addons. Do you think having only Shockwave is a problem with Easy Youtube Downloader?

''FredMcD [[#answer-1242103|said]]'' <blockquote> Have you checked the overflow? ---------------- '''Separate Security Issue:''' Update your Flash Player or remove it using these links; [http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html Uninstall Flash Player | Windows] {web link} [http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-mac-os.html Uninstall Flash Player | Mac] {web link} '''Note: Windows users''' should download the '''ActiveX''' for ''Internet Explorer.'' '''and''' the '''plugin''' for ''Plugin-based browsers'' (like Firefox). '''Note: Windows 8 and Windows 10''' have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the ActiveX. Flash Player '''Version 32.0.0.223 ''' https://get.adobe.com/flashplayer/ Direct link scans current system and browser '''Note: Other software''' is offered in the download. <Windows Only> https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) '''Note: Other software''' is offered in the download. <Windows Only> +++++++++++++++++++ See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration </blockquote> Thanks for the reply. It is my understanding that Adobe no longer develops the flash player for firefox running on Linux. What I have is Shockwave Flash. I can watch videos with no problems and use other download addons. Do you think having only Shockwave is a problem with Easy Youtube Downloader?
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FredMcD
  • Top 10 Contributor
4250 solutions 59444 answers

Shockwave is flash player. Some websites still use flash but many have switched to the HTML5 player.

FredMcD said

Have you checked the overflow?
Shockwave is flash player. Some websites still use flash but many have switched to the HTML5 player. ''FredMcD [[#answer-1242103|said]]'' <blockquote> Have you checked the overflow? </blockquote>
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Question owner

FredMcD said

Shockwave is flash player. Some websites still use flash but many have switched to the HTML5 player. FredMcD said
Have you checked the overflow?

Hi. I'm sorry, I don't know how to check that.

''FredMcD [[#answer-1242105|said]]'' <blockquote> Shockwave is flash player. Some websites still use flash but many have switched to the HTML5 player. ''FredMcD [[#answer-1242103|said]]'' <blockquote> Have you checked the overflow? </blockquote> </blockquote> Hi. I'm sorry, I don't know how to check that.
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lucho said

FredMcD said
Shockwave is flash player. Some websites still use flash but many have switched to the HTML5 player. FredMcD said
Have you checked the overflow?

Hi. I'm sorry, I don't know how to check that.

Oh, do you mean the overflow menu in customize? It is empty.

''lucho [[#answer-1242172|said]]'' <blockquote> ''FredMcD [[#answer-1242105|said]]'' <blockquote> Shockwave is flash player. Some websites still use flash but many have switched to the HTML5 player. ''FredMcD [[#answer-1242103|said]]'' <blockquote> Have you checked the overflow? </blockquote> </blockquote> Hi. I'm sorry, I don't know how to check that. </blockquote> Oh, do you mean the overflow menu in customize? It is empty.
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FredMcD
  • Top 10 Contributor
4250 solutions 59444 answers

Helpful Reply

What icon is missing?

It’s possible that there is a problem with the file(s) that store the extensions registry.

Type about:support in the address bar and press enter.

Under the page logo on the left side, you will see Application Basics. Under this find Profile Folder. To its right press the button Show Folder. This will open your file browser to the current Firefox profile. Now Close Firefox.

Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder

Linux: Under the page logo on the left side, you will see Application Basics. Under this find Profile Directory. To its right press the button Open Directory.

Delete all extensions* files and compatibility.ini in the Firefox profile folder to reset the extensions registry.

New files will be created when required.

After, restart Firefox.

See "Corrupt extension files":

+++++++++++++++++++++++++++ You will have to approve the updating one last time.

What icon is missing? It’s possible that there is a problem with the file(s) that store the extensions registry. Type '''about:support''' in the address bar and press enter. Under the page logo on the left side, you will see '''Application Basics. ''' Under this find '''Profile Folder. ''' To its right press the button '''Show Folder. ''' This will open your file browser to the current Firefox profile. Now '''Close Firefox. ''' Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder '''Linux: ''' Under the page logo on the left side, you will see '''Application Basics.''' Under this find '''Profile Directory. ''' To its right press the button '''Open Directory. ''' Delete all '''extensions*''' files and '''compatibility.ini''' in the Firefox profile folder to reset the extensions registry. *https://support.mozilla.org/kb/Profiles New files will be created when required. After, restart Firefox. See "Corrupt extension files": *http://kb.mozillazine.org/Unable_to_install_themes_or_extensions *https://support.mozilla.org/kb/Unable+to+install+add-ons +++++++++++++++++++++++++++ You will have to approve the updating one last time.
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Question owner

FredMcD said

What icon is missing? It’s possible that there is a problem with the file(s) that store the extensions registry. Type about:support in the address bar and press enter. Under the page logo on the left side, you will see Application Basics. Under this find Profile Folder. To its right press the button Show Folder. This will open your file browser to the current Firefox profile. Now Close Firefox. Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder Linux: Under the page logo on the left side, you will see Application Basics. Under this find Profile Directory. To its right press the button Open Directory. Delete all extensions* files and compatibility.ini in the Firefox profile folder to reset the extensions registry. New files will be created when required. After, restart Firefox. See "Corrupt extension files": +++++++++++++++++++++++++++ You will have to approve the updating one last time.

Hi. Thanks again for your help. As far as I can tell, the only icon/item missing in the toolbar items menu is the Easy Downloader.

I followed the procedure you laid out, but the problem persists. I even did it a second time with the extension removed but nothing changed. I also read the links you provided. It does not appear to be a compatibility problem, else this procedure should have fixed it. It's apparently not an installation issue because I can see the extension enabled on the list of addons. Yet, the item refuses to appear on the toolbar items menu.

By the way, I also tried installing another Downloader addon and had no problems there.

''FredMcD [[#answer-1242176|said]]'' <blockquote> What icon is missing? It’s possible that there is a problem with the file(s) that store the extensions registry. Type '''about:support''' in the address bar and press enter. Under the page logo on the left side, you will see '''Application Basics. ''' Under this find '''Profile Folder. ''' To its right press the button '''Show Folder. ''' This will open your file browser to the current Firefox profile. Now '''Close Firefox. ''' Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder '''Linux: ''' Under the page logo on the left side, you will see '''Application Basics.''' Under this find '''Profile Directory. ''' To its right press the button '''Open Directory. ''' Delete all '''extensions*''' files and '''compatibility.ini''' in the Firefox profile folder to reset the extensions registry. *https://support.mozilla.org/kb/Profiles New files will be created when required. After, restart Firefox. See "Corrupt extension files": *http://kb.mozillazine.org/Unable_to_install_themes_or_extensions *https://support.mozilla.org/kb/Unable+to+install+add-ons +++++++++++++++++++++++++++ You will have to approve the updating one last time. </blockquote> Hi. Thanks again for your help. As far as I can tell, the only icon/item missing in the toolbar items menu is the Easy Downloader. I followed the procedure you laid out, but the problem persists. I even did it a second time with the extension removed but nothing changed. I also read the links you provided. It does not appear to be a compatibility problem, else this procedure should have fixed it. It's apparently not an installation issue because I can see the extension enabled on the list of addons. Yet, the item refuses to appear on the toolbar items menu. By the way, I also tried installing another Downloader addon and had no problems there.
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Chosen Solution

After searching in some obscure page, I found the answer. Apparently this is the only downloader addon that does not create an icon. Sorry for the trouble and thanks a ton for the help.

After searching in some obscure page, I found the answer. Apparently this is the only downloader addon that does not create an icon. Sorry for the trouble and thanks a ton for the help.
Was this helpful to you?
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FredMcD
  • Top 10 Contributor
4250 solutions 59444 answers

That was very good work. Well done. Please flag your last post as Solved Problem as this could help others with similar problems.

That was very good work. Well done. Please flag your last post as '''Solved Problem''' as this could help others with similar problems.
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James
  • Moderator
1596 solutions 11254 answers

lucho said

Thanks for the reply. It is my understanding that Adobe no longer develops the flash player for firefox running on Linux. What I have is Shockwave Flash.

FredMcD said

Shockwave is flash player. Some websites still use flash

"Shockwave Flash" is the old name for "Flash Player" which is available for Windows, Mac OSX, and Linux at https://get.adobe.com/flashplayer/ and https://get.adobe.com/flashplayer/otherversions/

The "Shockwave (for director) Player" Plugin is not to be confused with "Shockwave Flash" as it is a different NPAPI Plugin not really supported by any web browser now days for a good while now except maybe IE. This NPAPI Plugin was not available for Linux. The "Shockwave Player" is pretty much discontinued now https://helpx.adobe.com/shockwave/shockwave-end-of-life-faq.html

Adobe has been supporting NPAPI Flash on Linux with the same branch as for Windows and Mac OSX again since December 2016. Before that (not including Beta builds in testing months before) only the old 11.2 extended support branch was being supported on Linux (NPAPI) for some years.

Though now days many websites are making use of HTML5 player only or alongside the (NPAPI) Flash Player Plugin for video, audio and games.

Adobe plans to EOL Flash Player in late 2020 however many web browsers will be limiting or dropping support before then. https://developer.mozilla.org/en-US/docs/Plugins/Roadmap https://theblog.adobe.com/adobe-flash-update/

''lucho [[#answer-1242104|said]]'' <blockquote> Thanks for the reply. It is my understanding that Adobe no longer develops the flash player for firefox running on Linux. What I have is Shockwave Flash. </blockquote> ''FredMcD [[#answer-1242105|said]]'' <blockquote> Shockwave is flash player. Some websites still use flash </blockquote> "Shockwave Flash" is the old name for "Flash Player" which is available for Windows, Mac OSX, '''and Linux''' at https://get.adobe.com/flashplayer/ and https://get.adobe.com/flashplayer/otherversions/ The "Shockwave (for director) Player" Plugin is not to be confused with "Shockwave Flash" as it is a different NPAPI Plugin not really supported by any web browser now days for a good while now except maybe IE. This NPAPI Plugin was not available for Linux. The "Shockwave Player" is pretty much discontinued now https://helpx.adobe.com/shockwave/shockwave-end-of-life-faq.html Adobe has been supporting NPAPI Flash on Linux with the same branch as for Windows and Mac OSX again since December 20'''16'''. Before that (not including Beta builds in testing months before) only the old 11.2 extended support branch was being supported on Linux (NPAPI) for some years. Though now days many websites are making use of HTML5 player only or alongside the (NPAPI) Flash Player Plugin for video, audio and games. Adobe plans to EOL Flash Player in late 2020 however many web browsers will be limiting or dropping support before then. https://developer.mozilla.org/en-US/docs/Plugins/Roadmap https://theblog.adobe.com/adobe-flash-update/
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