Firefox Community Forum

Important update! On March 14, 2025, a critical root certificate in Firefox will expire. If you’re still using an older version (before Firefox 128 or ESR 115.13+), it’s crucial to update to Firefox 128 or newer to avoid issues with add-ons, DRM-protected content, and other features.

For full details, check out Update Firefox to prevent add-ons issues from root certificate expiration.

If you have questions about the update or need help with the process, this is the place to ask! Whether you’re just starting or you’ve already updated and want to share your experience, we’d love to hear from you.

Let’s come together, share tips, and ensure we’re all prepared. Drop your questions or insights below!

Got this error message on recent update and now Firefox doesn't work at all. Platform Version '131.0.3' is not compatible with minversion >= 131.0.2 maxversion <= 131.0.2

On the newest firefox update on Windows PC My PDF reading has been not displaying PDFs correctly on Firefox I tested on other PDF views and they work as normal (All images are normally white with black text PDFs) Sometimes it displays nothing at all (as seen in Image 1) Some pages will display correctly but the rest won't (as seen in Image 2) Some pages will display text but strangely (as seen in Image 3) It does flash white sometimes while scrolling but it still doesn't show text

I have used Firefox for longer than I care to remember and have never had any problem with it but this morning I switched on my PC and a new AI side bar has appeard on the left and I don't want it. Can you please make it so we can remove it and looking around the internet, I know I'm not the only one with this opinion.

A friendly hello to whomever is kind enough to read this! Your help is greatly appreciated!

The latest update caused an edit I made to my Profile's userChrome.css file to be nullified. Now there's huge bar where the tabs toolbar used to be, and apparently it's not the title bar, as when I activate the title bar in "Customize Toolbar," this huge gets replaced by the actual toolbar.

I've attached my css code below for inspection. It used to work perfectly, but after the last update (133.0) it's no longer working. What can I do to fix this and have it like I had it prior to the latest update (133.0)?

userChrome.css File: `#main-window[tabsintitlebar="true"]:not([extradragspace="true"]) #TabsToolbar > .toolbar-items {

 opacity: 0;
 pointer-events: none;

}

1. main-window:not([tabsintitlebar="true"]) #TabsToolbar {

   visibility: collapse !important;

}

1. main-window[tabsintitlebar="true"]:not([extradragspace="true"]) #TabsToolbar .titlebar-spacer {

       border-inline-end: none;

}

/* Adding empty space for buttons */

1. nav-bar {

margin-right:140px; }

/* 15px for dragging whole window by mouse*/

1. titlebar {

appearance: none !important; height: 15px; }

/* Fix for main menu calling by Alt button */

1. titlebar > #toolbar-menubar {

margin-top: 10px; }

/* Move minimize/restore/close buttons to empty space */

1. TabsToolbar > .titlebar-buttonbox-container {

display: block; position: absolute; top: 17px; right: 1px; }

1. sidebar-box {

 min-width: 250px !important;

}`

For the past month or two, at random times when I open Firefox, I see a message stating, "Looks like you reinstalled Firefox." To be clear I have not uninstalled Firefox in any instance where this message has been displayed.

When this happens, I’m unable to browse the web. To resolve the issue, I have to remove the uBlock Origin extension and reinstall it. Once I’ve done that, browsing returns to normal. However, I then need to reconfigure my filters and adjust settings within FireFox

I’ve tried uninstalling and reinstalling Firefox to see if that would prevent this issue, but it hasn’t worked.

This problem is specific to my PC—it has never occurred on my MacBook.

Any assistance in understanding why this happens and how to prevent it would be greatly appreciated.

Thank you.

Today I Receive Mozilla Firefox 133(64Bit) Update. After Successful Update. My Open Tabs Are Not Loading. Also, Firefox Become Very Slow When I Surf Youtube Videos. Video Stuck But I Can Hear Audio. Taking Time To Load Videos. Its A Portable Version.

Hello, could you please let me know if updating Firefox as suggested (version 128) will be compatible with my iMac OS X Version 10.9.5. Thank you very much. Kind regards AS.

There used to be an option for a separate search window on the address bar. I found it really useful especially for a instant spell check. The option was there then after an update, it wasn't. WHY WHY WHY????? Is there any way for me to put it back? I hate using the address bar to search! Unless I open a new tab or window, regaining control of the prior tab/window is difficult.

Don't know what to do with this:

A later version of Mozilla Firefox is required for Prime Video. To update, click the menu button (three horizontal stripes) on the web browser toolbar, click {1>Help<1}, {2>About Firefox<2}, and then click {3>Restart to update Firefox<3}.

I have updated Firefox from 115.16.1 to Firefox ESR because I use a Mac running OS 10.13.6. Is there a way, hopefully an easy way, to import all of the bookmarks and extensions I was previously using in 115.16.1 to ESR. Hope so. Thanks!

Gary

Hi ! I'm a long term user of the "Firefox" browser. My Firefox User Nº is : 14634487 I'm also an existing long term user of both "NordVPN" and "NordPass".

When logging in to "Nordpass" this morning on my (new) MacBook Pro, I received a message in the App window stating that they were "ending support for my extension on 30th of September" and inviting me to "get the latest extension to continue using NordPass in a browser"

So, I bought a 2 year subscription for the extension 'NordPass Premium for Firefox'. Nordpass has acknowledged this by email: Quote : "Thank you for your purchase Here are the details of your order. Item  : NordPass: 2-year subscription Price : £29.43/2 years VAT 20% - £5.89 Total: £35.32/2 years"

In a 'Welcome' email sent by NordPass, I clicked on "Download NordPass which opened a Firefox 'Add-Ons' web-page for downloading the app named "NordPass Password Manager and Digital Vault" - but the only functioning button was 'REMOVE' ! I tried to 'Log In' at the top right corner of the page but I then became stuck in a continuous loop of picture identifications to prove I was not a robot ! It just went on and on ! I abandoned it for a while and, when I returned, the 'Robot check was gone but all my attempts to get the extension have failed ! I can't for the life of me find ANY means of downloading and installing the extension I've PAID FOR !

Whether this is all owing to a fault on the "NordPass" side or in the "Firefox" browser side is a mystery to me. Either way, I'm sending this message to BOTH.

I've now given up trying to do it unaided. PLEASE, could someone advise me how I can get my extension !! If this isn't resolved quickly, I'll seek to have a refund of my £35.32 and will have seriously to consider leaving both "NordVPN" and "NordPass" and/or defecting from "Firefox" to the "Safari" browser.

I'm waiting eagerly to get this sorted. Regards, Ivor Mitackis

I have installed Thunderbird on a new PC desktop running Windows 11, copied all the server settings from my Mac laptop that are working correctly, yet i keep getting an error message that "Thunderbird failed to find the settings for your email account". My ISP will not provide detect support for your client, a "third party provider". What do I need to do?