Firefox Community Forum

I play https://crazyshooters.com/ and https://crazyshooters2.com/ a lot! But the game became laggy since Firefox 148 and my ping spikes up. Other browsers play fine. I am on Linux Mint if that helps. (147 and below run fine)

Media resource could not be decoded, error: Error Code: NS_ERROR_DOM_MEDIA_DECODE_ERR (0x806e0004) Details: virtual mozilla::MediaResult mozilla::FFmpegVideoDecoder<62>::DoDecode(mozilla::MediaRawData*, uint8_t*, int, bool*, mozilla::MediaDataDecoder::DecodedData&): avcodec_send_packet error: Unknown error occurred

I was in the middle of setting up a secondary profile with sync when the browser froze and became unresponsive for a few minutes. I killed the task and reopened the profile, it lacked the theme color I'd chosen and sync was not enabled. When trying to enable sync, I got the error message shown in the screenshot. To be clear, the profile it's asking me to switch to 'is' the profile I'm in. I've tried deleting the profile and the associated files from About:Profiles, but this issue persists.

I've also followed the steps contained in this issue and associated issues, but the profileID already matches: https://support.mozilla.org/en-US/questions/1581151

How can I resolve this so that I can sync this profile?

In a Private tab in strict mode (on Linux), I log into my Google account, then log out, clear all the cookies and cached data (Settings -> Privacy & Security -> Cookies and Site Data -> Clear Data -> tick all the boxes and clear everything), open a new private tab, go to the gmail website and it still remembers my account. However, if I quit Firefox and re-open it, then Google no longer remembers the account.

What information is deleted when I quit Firefox that is not deleted when I manually clear the cookies/cache/local data? Does anyone know why Google can still remember my account when I manually clear all the browsing data but not after I quit Firefox?

Thank you!

linux, firefox, and duck duck go search engine---i want to stop picture in a picture. include every instruction like if i am to use the address bar, where do i find that?

so i installed the atarashii extension, but it didn't work for me, so i deleted it, then rebooted my pc to notice that it's running, and i can't unistall it, i disabled it but for some reason it still works

so when I'm watching a video in a diff tab then navigate to a new tab, what appears to happen is a search box attached to the previous tab pops in that I cannot type into, but clicking the "go back to active tab" button in the seach box brings me back to my previous tab. pretty annoying and would like to figure out what the heck is doin this

Please provide clear, step-by-step troubleshooting instructions to identify the cause of the problem and explain how to fix it. If possible, include the Firefox settings I should check and any tests I can perform to determine whether extensions, hardware acceleration, graphics drivers, or network settings are responsible.

Hello, For about two or three days now, when I launch Firefox and try to open any website, it takes maybe one minute to load the page, then the navigation is OK on every website.

It only happens when I launch Firefox for the first time of my session. If I close it then relaunch it, it's still very swift.

I tried clear cache and remove cookies, just lost my logins lol but didn't work. I also tried with no extensions, nothing changed. Lastly I tried to set "network.captive-portal-service.enabled" to "false" in "about:config" but it didn't change anything neither.

So before I try anything else that could erase something on my profile, I'd rather ask here for some help :)

PS: running FF 153.0.4 on Debian Trixie with Mozilla repos. Only have two extensions: µblockOrigin and NoScript.

Thank you in advance!

Hi There are image display issues with Firefox. The attached image shows a screenshot comparing the same page on Glazy.org: Chrome on the left and Firefox on the right. The image appears too dark in Firefox, making it difficult to work using that browser. Is this a bug or a setting that needs adjusting? I haven't been able to find a solution. Thanks for your help.

I have albinism. Pure white backgrounds are not an annoyance – they cause physical eye pain and trigger migraines. Every time I visit support.mozilla.org or accounts.firefox.com, I am forced to endure #FFFFFF with no way to change it.

To anyone about to defend Mozilla blindly: this is about accessibility and eye pain, not brand loyalty, so do not silence me.

What Mozilla has done:

• Disabled extensions (Dark Reader, Stylus, Dark Mode) from modifying these pages – they are explicitly blocked by Mozilla's own Content Security Policy.
• Removed ui.systemUsesDarkTheme and layout.css.prefers-color-scheme.content-override from having any effect on these sites – they ignore prefers-color-scheme entirely.
• Left no about:config toggle to disable the forced light theme.

The only remaining workaround is a userContent.css hack with filter: invert(1) – which requires a visually impaired user to manually edit CSS files and restart the browser. That is not accessibility – that is hostility.

Security excuse – debunked:

• "We block extensions for security" – extensions are sandboxed. Blocking them on your own support pages is a deliberate policy choice, not a technical necessity.
• "We want a consistent brand appearance" – branding does not override accessibility. Forcing #FFFFFF on users with light sensitivity is a violation of basic inclusive design.
• "We respect prefers-color-scheme" – you do not. These two domains explicitly override it.
• "Users can just use Dark Reader" – you block it.

What I demand:

Make support.mozilla.org and accounts.firefox.com respect the system prefers-color-scheme media query. If you insist on light branding, add an official dark toggle in the site header – stored in a cookie or account preference. Stop blocking extensions from applying user‑chosen themes to your own sites. That is not security; it is control. You are a non‑profit that claims to value accessibility and user control. Your actions say otherwise. Fix these two domains. No CSS hacking should be required for basic vision safety.

ich kann Firefox nich in deutsch wiedergeben. Bei der Sprachauswahl geht immer alles auf Englich zurück. Das Problem besteht seit der Ubuntu-Version 18.04.6.was kann ich tun?

I have used Firefox since version 1.5 and have loved it and the community since. However, since finally scrapping Windows and switching completely to linux, Firefox has been frequently troublesome with random crashes. The crashes occur on any website I may be on and for seemingly no reason. It happens when I'm in the middle of browsing a page, just opened a new tab, or even when Firefox is simply open and I'm active on another open application.

Environment is as follows:

OS: Zorin OS 18 (Latest patches) (Based on Ubuntu) Mobo: Asus Crosshair VI Hero (Latest available BIOS) CPU: Ryzen 9 5900XT GPU: EVGA GeForce RTX 3080 XC Gaming (10GB) Ram: 8GBx4 G.Skill TridentZ RGB DDR4 (3200) Sys Drive: Samsung 970Evo M.2 Nvme 500GB

Firefox is installed via Flatpack through the built in app store in Zorin OS.

The crashes will sometimes be constant as well. Such as when it crashes, crash reporter comes up, then I click "Restart Firefox" and the second I see the window, it crashes again. This has been a constant problem though at random times ever since I switched back to Linux about 5 months ago.

Any help would be greatly appreciated. I don't want to have to change my primary browser from one that I am generally so happy with, and is also the browser that I recommend to everyone.