Firefox Community Forum

All of my extension buttons disappeared, both from the main toolbar and from the Extensions sub-menu. They are still installed however. The only entry visible in the Extensions button, or in Manage Extension Shortcuts, is for an extension that has no button (Markdown Viewer).

This issue persists even if I switch to a known-good backup of my profile.

Has anybody else experienced a similar problem? Or can you help me trouble shoot this issue please?

I'm busy playing audio in a tab of the browser. The sound quality is good (rich, full, deep). Next, I open a new window by any means (Ctrl+N / Open link in new window / Menu > New window) As the new window appears, the current audio playback becomes tinny / lower quality. After a 3 seconds, the normal good sound quality starts again.

I'm currently using Bluetooth connected headphones and this happens on different headphones. I have to find some wired headphones first before I can try that. This happens with every new window that I open, regardless of the number of open tabs in current windows or how many previous open windows I already have. This happens regadless if audio enhancements of the output device are enabled or not. Spatial sound is set to off. Windows is set to 'do nothing' & will not adjust the volumes of different sounds when I'm using my PC to place or receive telephone calls.

OS: Windows 11 with latest patches Firefox: latest & older builds Hardware drivers: All manufacturer drivers applied

Hello! I saw that the Test day event had started. In Firefox Beta, I entered messaging-system-action.testday in about:config, put it on a string and set the value to testday as it said in the instructions. When I restarted Firefox, the welcome window did not appear and there was also no letter S next to the search as it should be. Please help!

Thanks for the answers!

Vexi

Hi,

i am a longtime firfox user and donated sometimes for mozilla, after update 141.0 i figured out, that the implemented screenshottool arent using the manual setted folder for downloads and saving it in the normal "user" download folder on my os partition. sry my english isnt very well, i hope its understandable, what my problem is ;)

i hope this is known and will get fixed soon.

with request for feedback and thank you in advance

Myself and a colleague who both use Firefox on Mac are experiencing the exact same issues.

1. Table header cells don't show their text, unless we specify a font for the table

I tried to put an example of the HTML here but it was rendered as a table by this page. I'll add some images of the code instead to show it.

In Firefox the Header cells are not visible, but in Chrome the text appears correctly.

If we add CSS like...

<style> table { font-family: Arial, Helvetica, sans-serif; } </style>

...in the header then the missing text in the THs appears.

2. Other font issues

The Wave accessibility extension has text that doesn't appear and throw errors like this in the console...

downloadable font: rejected by sanitizer (font-family: "Open Sans" style:normal weight:400 stretch:100 src index:3) source: moz-extension://b86260c9-33f6-4529-b12f-a101d8607bd4/styles/open-sans-v17-latin-regular.woff

These only occur on Firefox on our Macs. Fine on PC and other browsers on the Macs.

We tried a whole series of tweaks to settings to try fix this.

I have tried resetting Firefox and doing a fresh install but nothing fixes either issue. Are these known issues with recent Firefox releases on Mac?

Good afternoon, Firefox support team! I've been having trouble displaying icons on my bookmarks bar for quite some time now. Usually, when bookmarks are added to the bookmarks bar, they are added with empty icons. Then, when you click on the link, the icon loads and appears in the browser on the bookmarks bar. For some reason, not all icons load. So in the attached screenshot, two bookmarks are highlighted, with which the described problem occurs. There may be more such problems, but it is not entirely clear what they are related to.

Updated to 115.26.0esr and it lost my profile, so I recovered it using about:profiles. I have my bookmarks but the "restore previous session" is not highlighted, so I have lost 40 something windows with maybe 5 tabs each. It would take forever to go thru Bookmarks and re-open every one of them.

how do I recover "restore previous session" after updating version & recovering Profile ?

Probably lost the Profile when I changed the filename - I like to show the version in the filename. How can I change the filename without losing my Profile & losing "restore previous session" ?

Firefox is much more than just a web browser. I provides also a gorgeous way to display PDF documents. You can configure with "horizontal scrolling" and "page fit" to show your document as several pages at once, which is a fantastic way to get an electronic music score display. Instructables: Electronic music score display The only caveat is that you must select "horizontal scrolling" and "page fit" for every document separately.

Do we have a trick to configure these options as default? That would be marvelous !

hello I have the following questions

I used Firefox browser on my laptop for 4 years, but later updated my hard drive due to insufficient memory. But before, the account did not enable the password synchronization function, and it was found that the password saved in the browser on the old hard drive was not synchronized back.

At present, I can still log in to my old hard drive through websites and search methods. I have tried copying all the folders on my old hard drive to my new computer, but it is currently not working. At present, I have saved the key4 file and logins. json, which are the original system passwords, but I don't know how to import them into the new system.

So please advise on how to solve my problem.

thank

Hi All,

I am trying to setup 2-Factor Verification for my Mozilla account however every time I enter in the 6 digit code it shows up with "Invalid or expired code. Check your authenticator app and try again."

And I am positive I am doing it right. As I would normally do it; scan the QR code, enter in the 6 digit code.

If anyone has the same issue or solved it, please let me know.

I am running Mageia 9 and have an HPM277dw printer. The printer seemed to install fine and works perfectly when printing from every application other than Firefox. When I try to print directly from the browser it will leave off some of the top of the page on a single page print or it will print the first page fine and leave off a portion of the top of the rest of the pages on a multiple page document.

I have Firefox configured with auto-expanding vertical tabs. Sometimes, when the mouse cursor leaves the Firefox window through the same border where the tab bar is located, the tab bar expands and stays in that state until the cursor returns to the Firefox window. This is especially annoying with two displays; if the cursor hovers over the tab bar right before moving to the second display, the tab bar remains expanded, overlapping part of the browser content.

Some/All extensions don't work in build in PDF viewer. Example:

• Extension: DeepL: translate and write with AI

When: Not work when select text and hit translate.

• Extension: Dark Reader

When: Colors isn't inverted to darker tones.

Thank you, open to all help!

Hello Last year, I first saw the icons in the far right top corner of home page (red 'X' and other orange one) kept turning grey. Now for several months the entire top 'task bar' area of Firefox home page constantly turns grey, then back to regular color, back and forth, in the most aggravating way. I tried all suggestions: disabled hardware accelerations, disabled themes and extensions, cleared cache.... Still persists. I just noticed it may occur mostly when more than one tab is opened, even just two. Has anybody else encountered this? I use Firefox as my only browser-- on a Toshiba laptop. Thanks.

Running Win 11 and Firefox 14.1.0 both latest builds. When creating a new bookmark and saving it to the toolbar, the icon does not appear in the toolbar, although it is saved to the toolbar lists. https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2025-07-27-09-41-29-345609.png

Since 141 update I have constant problems with youtube. Page does not load at all or loads only partially. Icons on sidebar are broken, youtube logo is black. I tried disabling ublock and greasemonkey but it did not help. Refreshing page multiple times and using ctrl+f5 sometimes helps but issue returns often, every few videos/visits. Clearing cookies helps but only for few hours and then issue returns.

Is it related to WebGPU support that was supposed to be added in 141? Can I disable it somehow?