Share feedback and join product discussions

Problems with full-screen videos.

After an update at the end of November, this problem started. Every video on YouTube or streaming, Twitch, Kick, when I try to put it in full screen, a strip appears in the left corner, making it possible to see the wallpaper. It's as if the site is ...

Good bye, thank you and good luck

For the first time since the 1990s, I've uninstalled Firefox and will not be using it going forward. I can no longer justify using the browser, let alone recommend it; in fact, I haven't recommended Firefox for 6 years.I've been using Firefox (or a v...

VANGUARD no longer works in FireFox

As of January 6, 2026, I can no longer get into Vanguard. My correct username and password return as incorrect. Works fine in Chrome.

Feedback welcome for New Tab widgets, now available via Firefox Labs

Update as of December 8 - we are un-pausing this feature in Firefox Labs, as we've resolved an issue where Lists were disappearing. It's important they persist! Hi! I’m Amber from the Firefox team. We’re testing a new idea: simple, built-in producti...

Firefox Memory Leak

I am currently on Firefox 131.0.3 running minimal extensions and I am still having this memory hogging issue. It's just Firefox it seems as well, but the way it handles computer memory is atrocious. It used to be Chrome that would hog resources, so p...

Resolved! Screenshots in private tabs Nightly

Why has the ability to take screenshots in private mode been removed in the latest version of Nightly? Is there another way to do this?

uähhh

I am very sorry to have to say this, but I am really angry. I have known Thunderbird since the beginning of 2000. I didn't use it because important functions were not available. Now that I am more or less forced to switch to Linux, everything depends...

2025 tax filing with windows 10

First of all, I'm 81 years old, so be patient. Every year I buy the turbo tax disk (the basic/easy one, with no big wheelings and dealings), and insert it into my desktop computer which has windows 10 and my browser is Mozilla Firefox which I am tol...

firefox is eating up my memory like crazy

Hiin the past two weeks or so firefox started to eat up all my memory.15 gigs for 7 tabs and its keeps getting up.telling me to restart the program is kind of embarrassing...you've got a serious problem with your product!! i love it but you've got to...

How to connect Thunderbird to my Mozilla account (without loosing the archive of my present log-in!)

In the Help-pages about the new Mozilla account, there is no reference to how to connect existing Mozilla services accounts other than Firefox. So I have no idea how I can safely connect Thunderbird to my Mozilla account and not lose my 20 years of T...