I had a big problem with Firefox : "Firefox is already running, but is not responding. To use Firefox, you must first close the existing Firefox process, restart your device, or use a different profile.". Couldn't open multiple instances or windows at the same time.

I tried a lot of things : reinstalling (Snap/Mozilla PPA/Mozilla binaries), modifying bash env variables (GTK3_MODULES, GTK_MODULES, GTK_IM_MODULE, DBUS_SESSION_BUS_ADDRESS), reinstalling dbus, a11y (at-spi2-common), even mate-desktop... I also tried other browsers (Opera, Brave, ...) : Firefox was totally unusable!

In fact it was DBUS_SESSION_BUS_ADDRESS, but it wac correctly set! (unix:path=/run/user/1000/bus)... so I thought.

The problem was : I tried to launch Firefox with different methods :

• From terminal command line : everything was OK
• From terminal (click on URL) / Ctrl-Alt-F : everything was OK
• Custom Keyboard Shortcuts (mate) : OK
• With just (https://github.com/casey/just) : OK

But : some had DBUS_SESSION_BUS_ADDRESS correcly set, other were empty.

Any method could function... if it was run first. Then, when I used another method... BAM failure.

By setting the same export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus for everyone, it works (change 1000 for your userid).

$ DBUS_SESSION_BUS_ADDRESS= firefox
[Parent 99979, Main Thread] WARNING: Failed to create DBus proxy for org.a11y.Bus: L’adresse indiquée est vide
: 'glib warning', file /build/firefox/parts/firefox/build/toolkit/xre/nsSigHandlers.cpp:201

** (firefox:99979): WARNING **: 21:46:03.478: Failed to create DBus proxy for org.a11y.Bus: L’adresse indiquée est vide

Bonus : if you dislike Firefox GTK Warnings, check your GTK3_MODULES, GTK_MODULES, GTK_IM_MODULE env variables. I don't use accessibility tools, and I decided to unset them. No more Warnings

I am forking quick-dial because it hasn't seen development in some time, but it's a great simple speel dial extension. I want to add a few things to the javascript and HTML, and when I'm done, I wanted to send it back to the user here for review and testing. I haven't yet seen an article on the mozilla website on how to publish a firefox extension...does anyone know how to do this? Thanks in advance!

Here is the quickdial extension: https://addons.mozilla.org/en-US/firefox/addon/quick-dial/

I'm running the latest Firefox v133 and I use a dark theme for my browser specifically the Firefox Gnome Theme, but I want to keep all the websites displaying in a light theme. However if I choose Light Theme in General>Language and Appearance>Website Appearance, it will make my Firefox Home tab and new tab page light as well, which is something I do not want, so for my theme I want to keep that page dark as well.

I just want to know what the about:config setting is that I can have Firefox disable this check so that it always keeps the websites using Light Theme by default. Does anyone know what the exact setting is called? Would appreciate any help, thank you.

my first ever project for firefox and my very first extension.
a smart amazon tracker that will show decreased prices for any product you want without being complicted or heavy.
https://addons.mozilla.org/en-US/firefox/addon/amazon-price-tracker/

please let me know if you want more updates or futures

uBlock finally got taken off my chrome after an update yesterday, so I opened Firefox to try it out as an alternative browser. It asked me to update the browser before I could add any extensions, so I did; but even with the up to date version, trying to install any from the main site just results in an endless loading bar. I thought it might just be for adblockers, but haven't been able to successfully install anything else yet either. I tried saving the install links as files, then importing them from extension settings, but no effect there either. What could be the issue?

Error code: PR_CONNECT_RESET_ERROR

I can't acess a website in firefox but its accessible in chrome or edge albeit without ad blockers

Its a really simple problem to descripe but not easy to solve:

at twitch.tv i can not choose German(Deutsch) as Language, if i choose german it switches automatically to English, all other Languages works. someone with a hint whats happened on my firefox?

Is there a way to STOP a page from auto-refreshing after being idle for a bit?

Seems to happen on YouTube Subscription pages a LOT. I'll leave it idle in a tab, and whenever I go back to the tab, it will auto-refresh.

I've tried looking for 'accessibility.refreshdisablefcache' in the 'about:config' page, and it's not there.

Is there a way to stop this behavior without an extension?

My firefox has been freezing randomly on sites it usually does well on. This does not happen on ESR.

EDIT: right after I posted this esr froze on me. Maybe the problem is with hyprland. Idk.

Hi, I have shorts disabled in the settings but the ones that appear on the right side when you watch a video are still there, anything else I can do? or maybe i'm just missing something?

Tried these three even with clearing my cookies,still did not work.

https://addons.mozilla.org/en-US/firefox/addon/snapchat-web/?utm_source=addons.mozilla.org&utm_medium=referral&utm_content=search

https://addons.mozilla.org/en-US/firefox/addon/snapchat-web-fixer/?utm_source=addons.mozilla.org&utm_medium=referral&utm_content=search

https://addons.mozilla.org/en-US/firefox/addon/better-snapchat/?utm_source=addons.mozilla.org&utm_medium=referral&utm_content=search

As per title: How do I disable custom mouse cursors on websites, preferably without an add-on? I have trouble finding a way to do this, no results here or on firefox site.

Basically the title. Am trying to have Firefox come through one virtual audio device and the rest of my pc audio come through another virtual audio device, Thanks

When I view Reddit on my Mac (Sequoia 15.2), I can't use the search feature. As soon as I start to type a search, the page goes blank. Then it refreshes without any of my search and the cursor is no where to be found. Safari and Chrome work fine.

Any suggestions on how to use Firefox to view Reddit on my Mac?

Windows 11, Firefox 133.0.3...no blocker extensions.

As of this morning, videos from Xitter, Facebook, Threads...even YouTube don't work. Everything is fine in Chrome though.

When going to play any video, it just spins. Anyone else seeing this?

Update: Not sure what exactly was at fault as only Firefox was experiencing an issue, but I closed all my windows and tried to restart...and the restart just sat spinning as well. Canceled restart, then although Windows "worked" I couldn't shut down, etc. Had to force reboot, and now everything is working fine. Likely a weird Windows glitch...

https://preview.redd.it/8seck3k1w78e1.png?width=948&format=png&auto=webp&s=872f6a86c9258f05044e5eeed85667666402ce2f

To reproduce:

1. Open Firefox and go to https://github.com/conda-forge/miniforge
2. Click on the "Mamba" link in top of the README, which is simply an innocent link to another GitHub repo.

https://preview.redd.it/s85ecyvax78e1.png?width=927&format=png&auto=webp&s=e27859e3ce94833872d8e64133cafeca22333ea0

3. Trigger "Go back" of the browser, and boom.

I am using Firefox Developer Edition 134.0b10 (for Arch Linux).

Update: Seems that this issue has nothing to do with Firefox, it is Google Safe Browsing that strangely marks the specific url (repo link + "?tab=readme-ov-file") as unsafe.

I switched from chrome this year because of Manifest v3. If you switched this year, why?

In light of Google's decision regarding cookies and fingerprinting, I've decided to leave the browser. Thing is, I've only ever used Chrome, so I'm not really sure what to switch to.

What makes FireFox so great? I'm not super techy, so I'm honestly asking for the dumb downed explanation. Especially since I heavily use Google Drive.

I had to reset my Firefox a while ago and before if i opened the sidebar it was always on History and it always had the same size as before.

Now it always opens on bookmarks and defaults to the smallest size. How can i fix this?

As per my previous post: (https://www.reddit.com/r/firefox/comments/1frafky/comment/m2ugr1v/)

I had this issue where Firefox would keep reopening tabs 'randomly'

After doing some researches, i managed to reproduce the issue consistently.

1. First of all start Firefox and open a few tabs
2. Close Firefox
3. Open a Private Window
4. Open Firefox again, tabs will be restored

I guess Firefox tries to recover session when you open Private Window and this is really annoying..

Poof Of Concept.mp4

https://reddit.com/link/1hj7ima/video/dmblwnr4m68e1/player

I've many collections on FF home screen with links but idk how to sync them or transfer them.

Any solution?

Accidentally hit it too many times and the option to restore previous session never works after I hit cmd, shift, w, so want to disable it all together.

Is there a setting in the config that will let me do this?

They are annoying for me, is there any way to hide icons?

And second question: in Safari there are 'Show Next Tab' and 'Show Prevoious Tab' items in Window menubar - I can hook them to shortcuts via MacOS keyboard settings - very convinient way to switch tabs for met, looking for similar options to switch tabs in Firefox as well, but FF lacking those items in 'Window' menubar. How can I go to left or right tab with keyoard?

https://preview.redd.it/vh7u7yu4s58e1.png?width=1094&format=png&auto=webp&s=f83d0cf26ab535f949574fa1a8aa4ae54a55351b

Hello. Edge vs Firefox:

https://preview.redd.it/d1l1ynz7f58e1.png?width=282&format=png&auto=webp&s=8c7be25a81f2c41791926f4c12a1ee846c701cca

Edge: not much whitespace, very informative

FF: fancy fading, less informative.

How to fix?

Video won't be smooth, and it takes an ridiculous toll on the GPU. Is anyone having the same problem? (I have Ublock installed.)

I don't care bout blocking these accounts for them not able to view my profile or comments. Instead, I don't wanna view their comments and posts. If it's possible on Android (Firefox), it'll be better.

Hi, can anyone please help me fix this?
Firefox is set as my default browser. I have 2 persistent problems despite staying up to date with Firefox versions for months.

1. Rarely, when downloading something, Save As dialog box hangs (too rare to re-produce).
2. Often, whenever I click on a hyperlink in a spreadsheet/email software etc, it launches Firefox, but then immediately crashes and I get a crash error report window.

Here is a snippet I copied from the recent crash report where the word "error" was found:

GPUProcessLaunchCount: 1
GPUProcessStatus: Running
GpuSandboxLevel: 1
GraphicsCriticalError: |[0]GP+[GFX1-]: DCompositionSurface::BeginDraw failed: 0xd0000022 Rect(x=524288, y=524288, w=1024, h=512) (t=19.4349) |[1]GP+[GFX1-]: DCompositionSurface::BeginDraw failed: 0xd0000022 Rect(x=525312, y=525312, w=896, h=123) (t=19.4349) |[2]GP+[GFX1-]: DCompositionSurface::BeginDraw failed: 0xd0000022 Rect(x=525312, y=524288, w=896, h=512) (t=19.4349) |[3]GP+[GFX1-]: DCompositionSurface::BeginDraw failed: 0xd0000022 Rect(x=524288, y=525312, w=1024, h=123) (t=19.4349) |[4]GP+[GFX1-]: DCompositionSurface::BeginDraw failed: 0xd0000022 Rect(x=524288, y=524800, w=1024, h=512) (t=19.4349) |[5]GP+[GFX1-]: DCompositionSurface::BeginDraw failed: 0xd0000022 Rect(x=525312, y=524800, w=896, h=512) (t=19.4349) |[6][GFX1-]: Handling webrender error 4 (t=19.4349) |[7][GFX1-]: Fallback WR to SW-WR + D3D11 (t=19.4349).

________________

"media.gmp-gmpopenh264.lastInstallStart":1692732576,"media.gmp-gmpopenh264.lastDownload":1688580914,"media.gmp-gmpopenh264.lastDownloadFailed":1692732576,"media.gmp-gmpopenh264.lastDownloadFailReason":"Error: Failed downloading via ServiceRequest, status: 0, channelStatus: 2147500036, errorCode: 2, reason: error","media.gmp-gmpopenh264.lastUpdate":1688580914,"media.gmp-widevinecdm.lastInstallStart":1728173140,"media.gmp-widevinecdm.lastDownload":1728173153,"media.gmp-widevinecdm.lastDownloadFailed":1697776630,"media.gmp-widevinecdm.lastDownloadFailReason":"Error: Failed downloading via ServiceRequest, status: 0, channelStatus: 2152398878, errorCode: 2, reason: error","media.gmp-widevinecdm.lastUpdate":1728173153,"media.gmp-manager.lastCheck":1734466833,"media.gmp-manager.lastEmptyCheck":1734466833,"network.trr.strict_native_fallback":false,"privacy.fingerprintingProtection.pbmode":false,"privacy.trackingprotection.enabled":true,"signon.management.page.

Been trying to figure this out for awhile now, and I believe the issue has persisted (at least for me) across several versions of FF at this point. When I misspell a word and correct it via right clicking with my mouse, I get the expected spell suggestions and everything works as it should. Yet when I highlight a misspelled word and press the list key to access the very same context menu, I get no spell suggestions. Occasionally, (this has been occurring of recent) the first time I misspell a word and try to correct it with the list key, I do get a suggestion. But if i try a second time with another misspelled word in the same instance (I.E ChatGPT prompt, search bar on a site, etc...) , I once again get no spell suggestions. This problem occurs on both my windows 11 and Arch Linux installs, so It would appear it is a FF issue and not a problem with my OS.
Any suggestions on how to fix this would be greatly appreciated, as I'm convinced this is a FF bug that has yet to be addressed.