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Conflict between Adobe Acrobat and Adobe Reader and how I fixed it

For the past 5 years, I have owned Adobe Acrobat version 9, and recently installed Adobe Reader as well (version 10.7). I was previously able to set up Firefox to use Acr… (read more)

For the past 5 years, I have owned Adobe Acrobat version 9, and recently installed Adobe Reader as well (version 10.7). I was previously able to set up Firefox to use Acrobat to display PDF files in the browser without downloading them, but I recently noticed that this was no longer the case. Instead, every PDF file I tried to view was being downloaded instead. I came here to find a solution, and discovered that many other people are having similar problems. I followed the instructions given here (https://support.mozilla.org/en-US/kb/view-pdf-files-firefox-without-downloading-them), but found that they were actually UNhelpful. They tell you to turn off the Firefox PDF viewer by editing about:config to disable the file pdfs.js, which is the native Firefox PDF viewer-- but that will cause the PDF file type to disappear from the Tools/Options dialog, so you can't assign it to another program (whether Adobe or anything else). This makes it impossible to assign the Adobe plugin to open PDF files. I did figure out a solution on my own, and wanted to post it here to help other users with the same problem.

I ultimately learned, through trial and error and a lot of research both here and on Adobe's website, that the root cause of my problem was a conflict in Firefox between Acrobat and Reader. I was able to solve it by upgrading Acrobat, getting rid of Reader and enabling the Firefox PDF viewer so that I could assign the PDF file type to the Acrobat plugin within Firefox. Here are the details of my problem and how I solved it:

1. Acrobat and Reader conflict with each other in Firefox, but this isn't totally Firefox's fault. It's mostly Adobe's fault, and they pretty much admit it. Specifically, they say that Acrobat and Reader can't coexist on the same machine unless both are version 10 or higher. They tell you to upgrade to solve the problem--but I can't afford to pay for a new version of Acrobat. If you have to keep Acrobat 9.x, Adobe says the lowest version of Reader that will work with it is Reader 11. I couldn't upgrade to this because I have Vista, and Adobe hasn't issued Reader 11 for Vista (and doesn't plan to). I did cheat and download the Win 7 version of Reader 11, but it didn't help.

2. If you have both Acrobat and Reader, you can choose a setting in Reader to make it the default PDF handler--but Firefox ignores this information and defaults to Acrobat no matter what. (This is the part we can blame Firefox for.) If you have a version of Acrobat which is below 9.5.5, Firefox actually blocks it as a security risk, so the plugin won't work at all, regardless of version number. That's why PDFs are being downloaded through your standalone program instead of being displayed in the browser. If you want to view PDFs in Firefox and keep Acrobat on your computer, you MUST upgrade Acrobat to version 9.5.5 or above.

3. Unless you can upgrade Acrobat to at least 10.x, GET RID OF READER. As long as you can access Acrobat 9.5.5, it will work fine in Firefox and there's no need for Reader. I never used to have Reader myself, only Acrobat, but it must have been downloaded automatically when Acrobat was blocked by Firefox (which I didn't even realize).

4. IF YOU NEED TO UPGRADE ACROBAT 9.X TO 9.5.5, YOUR LAST CHANCE IS TODAY--6/26/13. Adobe has announced that today is the "end of life" for the Acrobat 9.x platform, and all support and upgrades will cease after today.

When I searched for updates by going to Adobe's website, it told me there were none available--but when I checked for them FROM THE ACROBAT PROGRAM ITSELF (Help/Check for updates), I was offered a 300 MB upgrade that took me all the way from version 9.0 to 9.5.5 in one step. (It did take a very long time to download and install.)

5. Once you have Acrobat 9.5.5, this is how to enable it in Firefox:

a. INSIDE ACROBAT, set your preference for "Internet" to "view PDF files in browser." Close Acrobat. Close Firefox if it's already open.

b. Reopen Firefox. Check Tools/Add-Ons/Plugins to make sure the Acrobat plugin is there. Enable it if disabled. Close Firefox.

If the plugin isn't there at all, repair your Acrobat installation through Control Panel. Then return to Firefox and enable it. Close Firefox.

c. Reopen Firefox again. Go to Tools/Options and check the list of file types. For the names that contain "Adobe" and "Acrobat," Acrobat should be set as the default program to open them. Select it from the drop-down list if it's not. Continue to scroll through the alphabetical list--you should see another entry called Portable Document Format. If it's there, the default will be "preview in Firefox." You should be able to change this to "Acrobat (in Firefox)" using the drop-down menu. Do NOT pick the option that says "Acrobat"--this is the standalone program and will cause your PDFs to be downloaded.

If you don't see "Acrobat (in Firefox)" as an option, this means your plugin is not working. Go back and fix it using the instructions above (including repair of Acrobat if necessary).

d. If you don't see a file type for "Portable Document Format" at all, that means the Firefox PDF viewer is disabled. You must enable it by editing the about:config file. To see it, type about:config in the Firefox address bar. You will get a warning message--just click OK and keep going.

This file is a long list of statements in alphabetical order. LOOK FOR A STATEMENT THAT SAYS "pdfjs.disabled" with a Boolean value of "true." Select this statement and right-click. A context menu will offer you choices including "Toggle." Select that one, which will change the Boolean value to "false." Exit about:config. Close Firefox.

e. Now return to Tools/Options, scroll through the list of file types, and you should see "Portable Document Format." Select "Acrobat (in Firefox)" as in the instructions above. Close Firefox.

f. The first time you try to open a PDF file in Firefox, you may get a dialog box which offers you choices of how to open the file. The first will be Acrobat, but DON'T CHOOSE THAT--it will cause your PDF to download. Instead, go to the choice that says "Open as application/pdf." You don't need to change the program that opens this file type, because your settings are already correct. Your PDF should open in the browser, with the full-featured Acrobat menu (including the option of editing or saving the file).

I hope other users can benefit from the truly painful experience I had figuring all of this out. Good luck.

Asked by harrietvane 6 years ago

Last reply by user633449 6 years ago

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Java vulnerability: What you need to know

I came across this and thought to pass it on; Java vulnerability: What you need to know Norton has been monitoring a vulnerability in Java that allows cybercriminals to l… (read more)

I came across this and thought to pass it on; Java vulnerability: What you need to know Norton has been monitoring a vulnerability in Java that allows cybercriminals to lure Internet users to virus-infected websites. This vulnerability puts users at risk for malware attacks. Here’s what you need to know:

   All versions of Java SE 7 Update 17 and earlier are affected.
   Norton recommends all Java users download and install the software update released by Oracle as soon as possible.
   Users may want to disable Java if it is not required.

Asked by FredMcD 6 years ago

Last reply by user633449 6 years ago

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How can I prevent Firefox from shutting down to 5% when inactive?

My computer (running Win8, FF 22.0, just installed) is set for maximum performance, which means it enters sleep mode only when I tell it to. But recently FF 21.0 and 22… (read more)

My computer (running Win8, FF 22.0, just installed) is set for maximum performance, which means it enters sleep mode only when I tell it to. But recently FF 21.0 and 22.0 has started shutting down to 5% of its normal operating memory use after as little as 60 seconds or so of inactivity. Then when I try to use it, it will SLOWLY reload, sometimes taking as long as 5 minutes or more! This is a relatively new behavior and a basically intolerable one. I cannot find any setting under Tools that addresses this, and the right click on the icon upper left now only deals with resizing. I do not want to go back to IE and have never liked Chrome at all, so I would hate to leave FF but I simply cannot continue to wait several minutes do do everything.

Asked by jfhuntsman 6 years ago

Last reply by jfhuntsman 6 years ago

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I tried to update to new version. Yesterday, you responded that I have the new version, but my screen does not look or function like the new version.

I sent a screen shot of firefox as a response to yesterdays email through gmail. I have not received a response back yet. My screen still looks like the old version. I… (read more)

I sent a screen shot of firefox as a response to yesterdays email through gmail. I have not received a response back yet. My screen still looks like the old version. I have none of the new attributes for being on the most current version of firefox.

Also, as I was trying to resolve my issue with not being able to open the itunes store I noticed that my firewall is not allowing the following: Plugin Container for Firefox. Should this be allowed?

Also, I am not able to download the itunes software through Firefox. I have to use either Google Chrome or Internet Explorer. Why would this be happening?

Please help. I'm not sure what is going on.

Asked by abaker 6 years ago

Last reply by user633449 6 years ago

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When I try to update my Microsoft Office 2010 Plugin...

When I try to update my Microsoft Office 2010 Plugin I get the following error message after I save and run the file: "This 32 bit product may only be installed on a 32 b… (read more)

When I try to update my Microsoft Office 2010 Plugin I get the following error message after I save and run the file: "This 32 bit product may only be installed on a 32 bit edition of Windows." What do I do?

Asked by Kushla01 6 years ago

Last reply by Kushla01 6 years ago

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deleted my saved passwords

Duplicate I will lock this please continue with /questions/964054#answer-453082 ~J99 i accidentally deleted all my saved passwords. can i get them back? i have been usin… (read more)

Duplicate I will lock this please continue with /questions/964054#answer-453082 ~J99


i accidentally deleted all my saved passwords. can i get them back? i have been using sync but i have not told firefox to sync since i deleted them.

Asked by leppyneko 6 years ago

Last reply by John99 6 years ago

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ATItesting.com won't work anymore on my firefox

Locking duplicate thread. Please continue here: [/questions/964185] I use a site called atitesting.com for nursing school, as of about a week ago, i can't open up the pr… (read more)

Locking duplicate thread.
Please continue here: [/questions/964185]

I use a site called atitesting.com for nursing school, as of about a week ago, i can't open up the practice tests anymore. I works on my laptop, but no longer on my imac desktop. Any suggestions?

i basically just won't load anymore at all.

Asked by ehueck 6 years ago

Last reply by kobe 6 years ago

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How to change Firefox's default zoom level

UPDATE! This question is not marked as answered, as the issue is a new 'feature' of Firefox 22, and if you read all the comments you'd see that. Clearly, with the large v… (read more)

UPDATE! This question is not marked as answered, as the issue is a new 'feature' of Firefox 22, and if you read all the comments you'd see that. Clearly, with the large volume of 'new' answers coming in saying the same thing over and over, people aren't, so I'll say it here: THERE IS NO NEED TO ANSWER THIS QUESTION ANY MORE.

I recently asked about my UI being big and fuzzy, and managed to get that fixed in the about:config, but websites are still big.

For some reason, the default zoom (ctrl+0) is at 120%.

I tried the FullZoom and NoSquint addons, but both had one issue. They messed up the top level image view (which for me works with the old default image style addon) and made the unzoomed image a bit bigger than my screen, and the magnifying glass icon which should appear with a + or - in it when I mouse over the image is just a regular mouse pointer instead.

How can I reset the default zoom to be 100% (or preferably about 80% because even 100 seems to be overcompensating for my high dpi screen) without an addon messing up my default image view?


Further details. If I disable the 'old default image style' addon, the top level image view works fine with the NoSquint or FullZoom addons.

Asked by EstragonHelmer 6 years ago

Answered by philipp 6 years ago

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where is my Roboform toolbar?

my Roboform toolbar disappeared using version 20 of firefox. just updated to version 22 and still no roboform toolbar showing in View toolbars... but of course it works … (read more)

my Roboform toolbar disappeared using version 20 of firefox. just updated to version 22 and still no roboform toolbar showing in View toolbars... but of course it works fine in Internet Explorer, which I don't want to use -- so fix it please.

Asked by karencon 7 years ago

Last reply by the-edmeister 6 years ago

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Firefox startpage

Locking Duplicate please see and continue with /questions/964572 ~J99 Hello. I always use the default firefox page as the start page when I think about that you can apply… (read more)

Locking Duplicate please see and continue with /questions/964572 ~J99

Hello. I always use the default firefox page as the start page when I think about that you can apply right away, I have so chosen Google as a search engine. So I need to use the search button which comes standard page. One day succeed for Yahoo to change that, so it did not go to google, but yahoo. after a lot of problems and reading on the internet, I uninstalled yahoo shit. So now I search on google again, but the search button which appears on firefox default page works no longer, nothing happens when I type something in and press search. It seems as if something has been removed from the default search page, so it does not link to google search engine. I go up in the right corner of the browser and search on google but not from the search box which appears on the default page. Can you help me solve this? It does not help to opdate the browser to another version, I have tried several times.

Asked by LK-2076 6 years ago

Last reply by John99 6 years ago

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What happened to the 'Reply' feature for e-mail messages? How does one do that now?

The old Firefox was easy to manuever through and accomplish actions desired without having to hit drop-down menus and had all actions listed on screen. With the new Fire… (read more)

The old Firefox was easy to manuever through and accomplish actions desired without having to hit drop-down menus and had all actions listed on screen. With the new Firefox that is not so. Can't find any place for 'reply' action. Is that no longer an option and if so, why not? Why do software experts think they are improving things when simple is best for the common folk? They just make things more complicated and frustrating.

Asked by lyontale 6 years ago

Last reply by jscher2000 6 years ago

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Calendar with new ATT/Yahoo browser is not where it was.

I had asked a question of the forum about the calendar in the "new and improved" AT&T/Yahoo browser/Email system. I received two replies with suggestions for a possi… (read more)

I had asked a question of the forum about the calendar in the "new and improved" AT&T/Yahoo browser/Email system. I received two replies with suggestions for a possible fix. I notified the sender that the first one did not work and do not remember if I told the sender that the second one, also, did not work and that I was going to forgo any further discussion or attempts at remediation. I cannot find the information within the forum that I sent and what was replied.

Asked by OldRetiredFellow 6 years ago

Last reply by the-edmeister 6 years ago

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bp-133bf6b5-3459-4a64-8c58-73df42130715

Locking as a duplicate please continue with /questions/965070 ~J99 - I have created one Silverlight Application, in that when i am opening the RadWindow of Telerik Window… (read more)

Locking as a duplicate please continue with /questions/965070 ~J99

- I have created one Silverlight Application, in that when i am opening the RadWindow of Telerik Window, at that time Silverlight plug in crashed.

Asked by vrutikashah1 6 years ago

Last reply by John99 6 years ago

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I can't get into search engines - says the site isn't found for both Yahoo & Google.

I got a response telling me how to set a search engine as default. That is not what I asked. I try to go to either Yahoo.com or Google.ca and get told "error 404 - this… (read more)

I got a response telling me how to set a search engine as default. That is not what I asked. I try to go to either Yahoo.com or Google.ca and get told "error 404 - this is all we know" and it won't let me even access the page never mind setting it as default. Until I did the upgrade, I didn't have this problem. How do I fix this?

Asked by lynnettew99 6 years ago

Last reply by cor-el 6 years ago

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Everything is too big on Firefox

When I downloaded Firefox's last update Firefox 22, Last night everything is now so zoomed in and big on this Firefox. Even the buttons seem bigger. I wanted to know how … (read more)

When I downloaded Firefox's last update Firefox 22, Last night everything is now so zoomed in and big on this Firefox. Even the buttons seem bigger. I wanted to know how can I reset everything so it will look like the previous update of Firefox ?


Everyweb page I go to I have to zoom out twice just to get it back to its normal size now.

Is there also away to just change the webpage zoom and leave the buttons there current size. My brother likes how big the buttons on firefox it self is but not how far it's zoomed in on web pages.

Asked by Basic204 6 years ago

Answered by philipp 6 years ago

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No sound in Firefox 22

Since I updated to Firefox 22 I have no sound with Firefox. I believe this might be because older versions of Quicktime have been disabled by Firefox but I have the late… (read more)

Since I updated to Firefox 22 I have no sound with Firefox. I believe this might be because older versions of Quicktime have been disabled by Firefox but I have the latest version - 7.7.1 which does NOT appear to have been disabled. When I return to Firefox 21 the sound is OK again.

Does anyone else have this problem? Is there a fix?

Asked by Sun-flower 6 years ago

Last reply by AliceWyman 6 years ago

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something called superfish is making window adds pop up. how do I stop this?

a small window pops up on the bottom right of the screen with an ad and in small print at the bottom is says "by Superfish" there is a button to disable it, but it makes … (read more)

a small window pops up on the bottom right of the screen with an ad and in small print at the bottom is says "by Superfish" there is a button to disable it, but it makes another window open that wants me to download something....

how do I get rid of this?

Asked by goomba888 6 years ago

Last reply by jscher2000 6 years ago

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I cant delete a program that is causing problems... it is called "backupduty lite" how can i get rid of it?

Locking duplicate thread. Please continue here: [/questions/965530] I was able to uninstall a program called backup duty lite...but then searched for more...found two m… (read more)

Locking duplicate thread.
Please continue here: [/questions/965530]

I was able to uninstall a program called backup duty lite...but then searched for more...found two more..but it wont let me delete them ...says it is protected...can you help me?

Asked by Golflogos 6 years ago

Last reply by jscher2000 6 years ago