Acrobat Reader DC has a new update please check Adobe's website for the update.

I have the latest update on the Adobe Acrobat X Pro: 10.1.15

In Firefox 40, the "not verified" indicates that the extension was not signed by Mozilla. However, it's just a warning and shouldn't disable any extension. The disabling starts in Firefox 41. Hopefully Adobe will get the extension signed in the next four weeks!

But for Create PDF 1.0 the Enable button doesn't work?

Unfortunately, Adobe's position on this problem seems to be that Acrobat X is not tested/supported on Windows 10: https://forums.adobe.com/thread/1917384

I think the issue is that for some reason Firefox is not finding the latest version of Create PDF shipped with Acrobat X, which was version 1.2. The version shown in your Question Details > More System Details is only version 1.0. Of course, I don't know whether 1.2 is to get signed in the next four weeks. We may be nearing the end of the line...

If this extension is very important to you, I'm going to suggest getting off the fast train of mainstream Firefox updates, and switching to the slow train of the Extended Support Release. That is based on Firefox 38 and will get regular security updates, but will not get the features of Firefox 39+ for at least the next six-seven months when a new ESR series launches.

If you decide to switch, here is how I suggest installing it:

Clean Reinstall

We use this name, but it's not about removing your settings, it's about making sure the program files are clean (no inconsistent, corrupted, or alien code files). As described below, this process does not disturb your existing settings. Do NOT uninstall Firefox, that's not needed.

(A) Download a fresh installer for Firefox 38.2.0esr from https://www.mozilla.org/firefox/organizations/all/ to a convenient location. (Scroll down to your preferred language.)

(B) Exit out of Firefox (if applicable).

(C) Rename the program folder, either:

(64-bit Windows folder names)

C:\Program Files (x86)\Mozilla Firefox

to

C:\Program Files (x86)\Fx40

(32-bit Windows folder names)

C:\Program Files\Mozilla Firefox

to

C:\Program Files\Fx40

(D) Run the installer you downloaded in (A). It should automatically connect to your existing settings.

Note: Some plugins may exist only in that old folder. If something essential is missing, look in these folders:

• \Fx40\Plugins
• \Fx40\browser\plugins

I'm wondering if this answer applies to me... using Acrobat X (and updates of it) are very important to me, I'm not ready to buy into Adobe's cloud until forced to. Jscher2000: would I follow the same instructions you wrote up here? Thank you! (and thanks again for your help yesterday with the Norton password vault issues).

Hi user7, the deadline to sign extensions was pushed back to a later version of Firefox, so Firefox 41 and 42 can still run unverified extensions. Since you are on Windows 7, I don't think you need to take any immediate action to change to the ESR version, but you could try it if you want to.

I notice on Adobe's release notes that they are not going to release any new security updates for Acrobat X or Reader X after the October update (10.1.16):

https://helpx.adobe.com/acrobat/release-note/release-notes-acrobat-reader.html

So if it's expensable, you might look into the new Acrobat for 2016 ($140 for Standard upgrade, $200 for Pro upgrade, standard software license).

Your info is very helpful. I know I'll need to make some decisions in the future about leaving Windows 7, and Adobe Creative Suite 6 (for my work I use InDesign, Photoshop and Illustrator, so along with Acrobat that's spendy). I'll look into whether the new Acrobat for 2016 that you mention will be compatible with CS6. And then there's the possibility that all these program updates may require a new computer, and that's another decision.

If I do stay at Firefox 42 (which I did update to since I lost the password vault anyway in the former version), are there any security or other risks?

Do you know if Adobe Flash is okay to use now with FF?

I hope I don't have to bother you further - I'll try!! :)

user7 said

If I do stay at Firefox 42 (which I did update to since I lost the password vault anyway in the former version), are there any security or other risks?

Unless there are no security bugs in Firefox 42, which seems unlikely given the course of history, Firefox 43 will contain useful fixes. That said, the severity of security bugs to be disclosed in the future is impossible to know today.

Do you know if Adobe Flash is okay to use now with FF?

Umm, usually?? I'm not sure what you mean.

Oh hey, Adobe released an updated version of Flash yesterday. So back to the distribution page for version 19.0.0.245...

https://www.adobe.com/products/flashplayer/distribution3.html

You'll want the one for "plugin-based browsers", either EXE or MSI (they work the same).

I have Adobe Acrobat XI Pro and have been using it for some time. Suddenly last night (12/16/2015) Firefox disabled the Adobe Acrobat - Create PDF 2.0 Add On I've been using also for some time with Windows 10. This disabling came out of "thin air". I have Firefox 43. What is going on?

Hi Mark In Lincoln, Firefox 43 now requires that extensions be digitally signed by Mozilla. This article has more information: Add-on signing in Firefox.

Unfortunately, Adobe hasn't yet updated for this. Since work needs to happen now, you can make a global exception to the signing requirement (there's currently no way to only make an exception for specific extensions).

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful.

(2) In the search box above the list, type or paste xpin and pause while the list is filtered

(3) Double-click the xpinstall.signatures.required preference to switch it from true to false -- note that this is for Firefox 43 only

I have attached some screen shots illustrating the about:config page and the change you should see on the Add-ons page.

The identical situation occurred with the MultiRow Bookmarks Toolbar Plus 1.6 and the Logitech SetPoint 6.5. It is quite disturbing that Firefox suddenly disables these Add Ons , without notice, that I've been using with Firefox 43 with NO PROBLEM up until last night (12/16/2015). Right now I am extremely annoyed at FireFox. One of the main reason why Firefox is my default browser is due to the MultiRow Feature. If it wasn't for that, I'd be using Google Chrome.

Hi Mark In Lincoln, this is one of a number of actions designed to reduce malware infections through the vector of extensions. Unfortunately, many extension authors do not have the time or inclination to submit their extensions to the Add-ons site where they would be signed automatically, or having Mozilla sign it before distributing it on their own sites.

• MultiRow Bookmarks Toolbar Plus - version 1.8 is pending review on the Add-ons site (https://addons.mozilla.org/firefox/ad.../versions/); I don't know what is holding it up, but the reviews saying this extension is adware could indicate there is some problem with disclosures about or ability to disable internal sponsorship or tracking features the developer needs to address, just a guess

• Logitech SetPoint - I don't know what this does, but often hardware device drivers are the slowest pieces of any puzzle to get updated

I followed your instructions above and was able to enable the three add ons mentioned (Adobe Acrobat - Create PDF 2.0, MultiRow Bookmarks Toolbar Plus 1.6, and LogiTech SetPoint 6.5). Thank you.

jscher2000 said

'''Hi Mark In Lincoln, Firefox 43 now requires that extensions be digitally signed by Mozilla. This article has more information: Add-on signing in Firefox. Unfortunately, Adobe hasn't yet updated for this. Since work needs to happen now, you can make a global exception to the signing requirement (there's currently no way to only make an exception for specific extensions). (1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful.(2) In the search box above the list, type or paste xpin and pause while the list is filtered (3) Double-click the xpinstall.signatures.required preference to switch it from true to false -- note that this is for Firefox 43 only I have attached some screen shots illustrating the about:config page and the change you should see on the Add-ons page.

--I was working way too late and accidentally clicked on the option to update Firefox, something I WAS NOT going to do after our conversation (jscher) ugg! I lost my Adobe PDF toolbar, which I use all the time. I did a system restore which went back 5 days, but it didn't restore the older version of firefox. I'm not experienced at having to do system restores, so it doesn't matter why it didn't work. I then came back to this spot where we were discussing this, and tried your recommendation above (quoted here), but the Acrobat pdf option didn't change. -What do you recommend: Is there a way I can reinstall the older version of firefox that allowed the acrobat PDF toolbar option, or do you have another idea? Thank you so much!!!

jscher2000... when I go back to the options choices, and try to do install from file, I get a message that says the file appears to be corrupt (nppdf32.dll), if you have any ideas, they are very appreciated, Debbie

Hi Debbie, please do not use the Windows system restore feature without backing up your Firefox data. It can cause irreversible damage.

Anyway, nppdf32.dll is the reader plugin. You can ignore that for the moment.

What version of the Create PDF extension do you have?

• If you have version 2.0, it will work in Firefox 43 if you make an exception to the signing requirement. Please see the following reply earlier in this thread: https://support.mozilla.org/questions/1079145#answer-818733

• If you have an earlier version such as 1.2, I think you might need to switch to the ESR version of Firefox. Please see the following reply even earlier in this thread: https://support.mozilla.org/questions/1079145#answer-771012

You should be able to check your version number on the Add-ons page. Either:

• Ctrl+Shift+a
• "3-bar" menu button (or Tools menu) > Add-ons

In the left column, click Extensions. Then scroll down to the bottom of the list on the right side (disabled extensions cluster at the bottom) and click the "More" link for Create PDF to view the version information.

Hi jscher, It's 1.2, thanks for the info on how to find that. I'll go back and read about the ESR version, thank you!

What Firefox data did I possibly damage by doing system restore?

Hi Debbie, the system restore results seem unpredictable. Some people report losing all their settings.

Thank you for your help, JSCHER! I'm considering subscribing to the Adobe cloud software in the near future. I hope the pdf problem wouldn't be an issue then.

Hi,

To all of you, it seems that withe the update of Acrobat XI (11.0.14) the problem with the "Create PDF" add-on is solved. In two computers where I made the update, the add-on is now accepted even though "xpinstall.signatures.required" is set "true".

Does this mean that the new version of the add-on has been accepted by Mozilla ?

For those of you using a MAC OS X.11.3, Mozilla Firefox 44.0, and Acrobat XI the "Adobe Acrobat - Create PDF is STILL disabled. Checking the "xpin" it reads - "xpinstall.signatures.required" is set "true". The current versions of all the NON Mozilla software indicates that either Mozilla or Adobe is 'not playing well with others'! For those interested you may be able to accomplish the tasks once handled by the aforementioned "ADD-ON" with Safari.