Firefox Support Forum

Hey folks, hopefully you can help with this mysterious issue!

I've been running Firefox successfully on my Windows 10 PC for a long while now. Last night, for some reason it simply ceased to work. New windows and tabs would not load any content. I also couldn't access the Settings at all (clicking on Settings in the browser menu produces no results or feedback.)

Yesterday, I had Firefox open all day (I usually have my computer on all day), and it was working fine. Around 8 or 9pm, I first noticed that none of my open tabs were loading any content, and the tabs had the "loading" animation playing. New tabs would also not load any content. I assumed it was an internet issue as I did see my internet connection get disrupted once or twice. I did not see anything (apps, etc) on my PC updating.

This morning I found Firefox was still not loading anything, although my internet connection was fine. I tried opening Chrome, and it ran just fine. Everything else that it is internet or cloud based on my PC is running fine too. So it seems to be an issue just with Firefox.

I have listed my steps to troubleshoot below, but I want to note one weird thing I observed: Even when Firefox is closed, and Task Manager doesn't show any Firefox processes open, my PC seems to think Firefox is running. For ex. while trying to uninstall Firefox or delete certain files, I would get a warning to "close Firefox first" or "can't perform this action while app is running." After seeing these, I would again confirm that Firefox appears closed and Task Manager shows no related tasks.

My PC build: - Windows 10 Home, 64 bit - Version 20H2 at start of issue (updated to 21H2 during troubleshooting) - OS build: 19044.1526

Things I have tried for troubleshooting already: - I have WebRoot on my computer due to my job, and I asked our IT staff if they could see WebRoot blocking anything related to Firefox on their end. They said it was not. - Used "Firefox Refresh" - Uninstalled and reinstalled Firefox - Cleared app cache / app data - Updated Windows from 20H2 to 21H2

Note: This message was sent on a different computer & browser

Hi.

Using Windows 10. Suddenly, Mozilla gives the "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window" message. I've tried all steps listed on the help site except reinstalling Windows 10, as the comment made said this would require reinstalling programs that did not come pre-installed on my PC, which I don't want to do if possible. I have uninstalled Mozilla, and the install stalls at about 70% with the aforementioned error message. Any help would be greatly appreciated! Thanks.

I had the same problem like the link below when I use firefox.

https://www.reddit.com/r/firefox/comments/tjxh7s/videos_freeze_when_window_isnt_in_focus/

So, did what the instruction says and it solved the problem regarding discord.

But, since I changed that setting, firefox doesn't remember my google login or dark skin settings of other websites (it was always automatically logged in when I use YouTube. Not like it remembers the password).

How can I solve it? I resetted firefox multiple times.

Amazon 'Look Inside' pop-up does not work with FF as I've configured FF. Iv'e included a screen snip.

I've unchecked block pop-ups but still the 'Look Inside' doesn't work.

Firefox recently stopped playing embedded youtube videos on my phpBB forum site?

i keep the latest firefox and only recently showed up embedded videos play fine on Chrome and others

here's a link to my forum which includes an embedded Youtube video demonstrating the issue, does it play on your browser? (ONLY firefox has an issue on my computer, chrome, etc. work fine)

https://www.mchenrysoftware.com/board/viewtopic.php?t=2045

thanks for any tests/insight into what might be causing the issue

brian

ADDITIONAL COMMENT: why don't you include a date on these posting? a lot of wasted time on old posts? and also need a 'Preview' on these before posting?

The styles look astonishingly wrong, I really think it is a problem on my end, but cant figure out how to fix it, as you can see in the pictures, text is incorrectly sized and/or justified, color gradients are also weird looking, as well as sizing of many elements and tons of other things.

I have tried to completely remove Firefox from my system and reinstalling it, that did not seem to fix it. The reason I think is is a problem of mine is because i was playing with fonts (emojis weren't working on my system,not on Firefox tho, now they are in both)

I don't think the things i did with the fonts did anything to Firefox, since this problem only showed up on Firefox, but since the problem arrived just after a reboot while I was installing and removing the fonts, I think its important to mention.

To sum up I think the problem comes from my local configuration of Firefox, I probably did not delete it all before reinstalling, I am running (Arch btw) a current version of EndevourOS.

Hello! I think I have tried EVERYTHING to get Firefox to stop crashing in the past 6 months. Today I am so frustrtated. Can anyone point me in the right direct. (and yes this happens with a fresh install, disabled add-ons, safe mode, yadda yadda yadda

bp-9d35ce5b-7503-4b20-894c-05b520220417

additional reports in image attached.

If you can help me...BLESS YOU!!!

Since the Firefox 99 update loading some pages (for example, the Gmail sign-in page) using Firefox on my Linux Mint machine, that I'm running a VNC remote desktop session on, results in a crash.

Crash report ID: bp-5dc1e89d-dc1f-40f2-9dbe-7f4380220419

I've tried running Firefox in safe-mode and the crash doesn't happen, but turning off hardware acceleration, swapping to default themes, removing all extensions, and completely removing Firefox and the .mozilla folder and then re-installing Firefox have not changed the crash behaviour in the absence of the safe-mode flag.

I would appreciate help in identifying what other paths of investigation I can take.

Thanks for last message you sent via "no-repy".

You ask me questions in those e-mails, but I can't reply.

The last had a lot of if you are running this ..... then this ....

I'm not using Windows XP or Vista!!!

I keep my software up to date.

Well, I guess I have to part from Mozilla. For a long while it was so good, but lately ...

This was going to be a question about Firefox being unable to display the file picker dialog, but I managed to find a solution that worked for me along the way. Since it was nowhere near the top of Google's results, I thought I'll share my solution in the hopes that this would help someone facing this same issue.

The hardware:

• Asus UM425IA Zenbook (AMD Ryzen 7 4700U CPU)

Worked in:

• Ubuntu 20.04 LTS
• Firefox provided by APT repository
• Xorg display server

Not working in:

• Ubuntu 22.04 LTS
• Firefox 99.0.1 provided by snap
• Wayland display server
• File picker worked briefly on fresh install, but something (not sure what) quickly breaks file picker functionality

The symptoms:

• Firefox stopped being able to open file picker dialogs
• Right clicking an image and selecting "Save Image As..." does nothing
• With forms that accept file upload (such as on this post question page "Add images (optional):"), clicking "Browse" does nothing
• File downloads work correctly when set to "Save files to ..." under Settings, but nothing happens when set to "Always ask you where to save files"
• No response to "Ctrl + O" open file shortcut

Similar questions and solutions:

• Fixed by reinstalling Firefox
• Fixed by resetting Firefox
• Fixed with a restart on a Mac
• Fixed by downgrading to Ubuntu 16.04

Things I tried that did not work:

• Disabling hardware acceleration
• Starting with add-ons disabled
• Troubleshoot mode
• Clearing startup cache
• Clearing cookies and site data
• Clearing history
• Refreshing Firefox
• Creating and using a new profile
• Deleting the `xulstore.json` file from the profile directory
• Toggling all permissions under Ubuntu Settings > Applications > Firefox to off and then back to on
• chmod 777 ~/Downloads
• Disabling native file picker "ui.allow_platform_file_picker = false"

And finally, what fixed it for me was to go into "about:config" and change "widget.use-xdg-desktop-portal.file-picker" from "2" to "0". Credit to this post that clued me in.

I really hope this saves someone else 2 days of hair pulling and I would appreciate advice from someone more knowledgeable than me on:

• Why this fixed the problem
• Whether I should be opening a bug report either against Firefox, or Ubuntu
• Whether I should also be changing "widget.use-xdg-desktop-portal.mime-handler" and "widget.use-xdg-desktop-portal.settings", both are currently set to "2"

Just now, after a massive and catastrophic SUPER-MELTDOWN-crash that arbitrarily decided to absolutely murder my day, ALL my tabs and windows and ALL history of "Recently Closed" tabs and windows is gone!

THIS IS COMPLETELY UNACCEPTABLE!

What is the reason for the existence of a SYNC feature if it isn't to MAKE SURE that a record of open tabs and windows is SECURELY maintained no matter how many times the application crashes, so that AT ALL TIMES, this information is kept INTACT, regardless of the state of the end users device? That is BY FAR the most important part of the sync feature! Are you telling me that there is no backup process of that information?

This is the kind of thing I never expected from you guys at Mozilla. I've been using Firefox for MANY years because I trust what you do. Today that trust has been SEVERELY and BRUTALLY wounded, most likely beyond repair...

I need you to fix this...

I need you to recover that information for me and I need you to make sure that what just happened could never, ever happen again unless God himself caused every digital storage unit on earth to disintegrate.

I cannot watch a video on youtube when it is in the process of being live streamed. I remember a time when I was able to, years ago, but I can't any longer. I'm not sure what has changed. I found an article that says to install the optional update called "Windows Media Pack" in apps and features, but no app with that name exists. It was only a year old solution, so I'm unsure of what changed so significantly. I just installed another optional windows update, and also updated the browser, but still doesn't work.

Edition Windows 10 Home Version 21H2 Installed on ‎09-‎Jun-‎20 OS build 19044.1466 Experience Windows Feature Experience Pack 120.2212.3920.0

Firefox: 97.0 (64-bit)

I booted into safe mode of Firefox and disabled all the extensions. I couldn't even boot the app, but now I can boot without being in safe mode, but if I close a tab, it crashes immediately. Or if I quit the app - it crashes.

AdapterVendorID: 0x106b Add-ons: reset-search-defaults%40mozilla.com:2.1.0,webcompat%40mozilla.org:28.0.1buildid20211210.021657,doh-rollout%40mozilla.org:2.0.0,formautofill%40mozilla.org:1.0.1,pictureinpicture%40mozilla.org:1.0.0,proxy-failover%40mozilla.com:1.0.2,screenshots%40mozilla.org:39.0.1,addons-search-detection%40mozilla.com:2.0.0,google%40search.mozilla.org:1.1,amazondotcom%40search.mozilla.org:1.3,wikipedia%40search.mozilla.org:1.1,bing%40search.mozilla.org:1.3,ddg%40search.mozilla.org:1.1,ebay%40search.mozilla.org:1.3,firefox-compact-dark%40mozilla.org:1.2 AvailablePhysicalMemory: 172670976 AvailableSwapMemory: 1045692416 BuildID: 20211218203254 ContentSandboxCapable: 1 ContentSandboxLevel: 3 CrashTime: 1641339399 DOMFissionEnabled: 1 DOMIPCEnabled: 1 ExperimentalFeatures: fission.autostart,media.videocontrols.picture-in-picture.allow-multiple InstallTime: 1640733686 MacAvailableMemorySysctl: 57 MacMemoryPressure: Normal MacMemoryPressureCriticalTime: Unset MacMemoryPressureNormalTime: 1641339386 MacMemoryPressureSysctl: 1 MacMemoryPressureWarningTime: Unset Notes: FP(D00-L1100-W00000000-T000) WR? WR+ GL Context? GL Context+ ProductID: {ec8030f7-c20a-464f-9b0e-13a3a9e97384} ProductName: Firefox PurgeablePhysicalMemory: 104349696 ReleaseChannel: release SafeMode: 0 SecondsSinceLastCrash: 16 StartupCrash: 0 StartupTime: 1641339386 TelemetryEnvironment: {"build":{"applicationId":"{ec8030f7-c20a-464f-9b0e-13a3a9e97384}","applicationName":"Firefox","architecture":"aarch64","buildId":"20211218203254","version":"95.0.2","vendor":"Mozilla","displayVersion":"95.0.2","platformVersion":"95.0.2","xpcomAbi":"aarch64-gcc3","updaterAvailable":true},"partner":{"distributionId":null,"distributionVersion":null,"partnerId":null,"distributor":null,"distributorChannel":null,"partnerNames":[]},"system":{"memoryMB":8192,"virtualMaxMB":null,"cpu":{"extensions":["hasNEON"]},"os":{"name":"Darwin","version":"21.1.0","locale":"en-US"},"hdd":{"profile":{"model":null,"revision":null,"type":null},"binary":{"model":null,"revision":null,"type":null},"system":{"model":null,"revision":null,"type":null}},"gfx":{"D2DEnabled":null,"DWriteEnabled":null,"ContentBackend":"Skia","Headless":false,"EmbeddedInFirefoxReality":null,"adapters":[{"description":null,"vendorID":"0x106b","deviceID":null,"subsysID":null,"RAM":0,"driver":null,"driverVendor":null,"driverVersion":null,"driverDate":null,"GPUActive":true}],"monitors":[{"screenWidth":1440,"screenHeight":900,"scale":2}],"features":{"compositor":"webrender_software","hwCompositing":{"status":"disabled:FEATURE_FAILURE_COMP_PREF"},"gpuProcess":{"status":"unused"},"wrQualified":{"status":"available"},"webrender":{"status":"unavailable-no-hw-compositing"},"wrCompositor":{"status":"available"},"wrSoftware":{"status":"available"},"openglCompositing":{"status":"unavailable:FEATURE_FAILURE_OPENGL_NEED_HWCOMP"},"omtp":{"status":"unused"}}},"appleModelId":"MacBookAir10,1","hasWinPackageId":null},"settings":{"blocklistEnabled":true,"e10sEnabled":true,"e10sMultiProcesses":8,"fissionEnabled":true,"telemetryEnabled":false,"locale":"en-US","intl":{"requestedLocales":["en-US"],"availableLocales":["en-US"],"appLocales":["en-US"],"systemLocales":["en-US"],"regionalPrefsLocales":["en-US"],"acceptLanguages":["en-US","en"]},"update":{"channel":"release","enabled":true,"autoDownload":true,"background":true},"userPrefs":{"browser.search.region":"US","browser.search.widget.inNavBar":false,"browser.startup.homepage":"<user-set>","browser.startup.page":3,"browser.urlbar.quicksuggest.dataCollection.enabled":false,"browser.urlbar.suggest.quicksuggest.nonsponsored":true,"browser.urlbar.suggest.quicksuggest.sponsored":true,"layers.acceleration.disabled":true,"privacy.donottrackheader.enabled":true,"widget.content.allow-gtk-dark-theme":false,"widget.content.gtk-high-contrast.enabled":true},"sandbox":{"effectiveContentProcessLevel":3,"contentWin32kLockdownState":3},"addonCompatibilityCheckEnabled":true,"isDefaultBrowser":true,"defaultSearchEngine":"ddg-addon","defaultSearchEngineData":{"loadPath":"[other]addEngineWithDetails:ddg@search.mozilla.org","name":"DuckDuckGo","origin":"default","submissionURL":"https://duckduckgo.com/?t=ffsb&q="}},"profile":{"creationDate":18989,"resetDate":18996,"firstUseDate":18989},"addons":{"activeAddons":{"doh-rollout@mozilla.org":{"version":"2.0.0","scope":1,"type":"extension","updateDay":18979,"isSystem":true,"isWebExtension":true,"multiprocessCompatible":true,"blocklisted":false,"description":"This 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Interventions","userDisabled":false,"appDisabled":false,"foreignInstall":false,"hasBinaryComponents":false,"installDay":18996,"signedState":3}},"theme":{"id":"firefox-compact-dark@mozilla.org","blocklisted":false,"description":"A theme with a dark color scheme.","name":"Dark","userDisabled":false,"appDisabled":false,"version":"1.2","scope":4,"foreignInstall":false,"hasBinaryComponents":false,"installDay":18996,"updateDay":18996},"activeGMPlugins":{"dummy-gmp":{"version":"0.1","userDisabled":false,"applyBackgroundUpdates":1}}},"experiments":{"bug-1690367-rollout-moving-webrtc-networking-functionality-into-i-release-87-100":{"branch":"active","type":"normandy-prefrollout","enrollmentId":"deee5207-5240-47f1-a661-69bdfdc07174"},"bug-1732206-rollout-fission-release-rollout-release-94-95":{"branch":"active","type":"normandy-prefrollout","enrollmentId":"bd1903ce-823e-4796-8f8c-7f2076775967"},"bug-1727384-pref-impact-study-for-total-cookie-protection-tcp-release-91-95":{"branch":"noop","type":"normandy-exp","enrollmentId":"909962d8-75ce-4b05-8ef5-98efc43496d3"}}} ThreadIdNameMapping: 6:"IPC I/O Parent",7:"Timer",10:"Socket Thread",11:"Permission",12:"JS Watchdog",20:"TaskController #5",18:"TaskController #3",19:"TaskController #4",17:"TaskController #2",21:"TaskController #6",16:"TaskController #1",15:"TaskController #0",22:"TaskController #7",23:"Cache2 I/O",24:"Cookie",26:"Worker Launcher",28:"WRWorker#0",46:"ImageIO",38:"WRWorkerLP#2",32:"WRWorker#4",34:"WRWorker#6",27:"Renderer",31:"WRWorker#3",36:"WRWorkerLP#0",30:"WRWorker#2",44:"Compositor",40:"WRWorkerLP#4",33:"WRWorker#5",37:"WRWorkerLP#1",39:"WRWorkerLP#3",42:"WRWorkerLP#6",35:"WRWorker#7",29:"WRWorker#1",47:"IPDL Background",41:"WRWorkerLP#5",43:"WRWorkerLP#7",51:"QuotaManager IO",52:"DOM Worker",50:"IndexedDB #1",52:"TRR Background",53:"IndexedDB #2",68:"StyleThread#4",69:"StyleThread#5",67:"StyleThread#3",65:"StyleThread#1",64:"StyleThread#0",66:"StyleThread#2",62:"ImageBridgeChld",63:"WRSceneBuilder#1",64:"WRSceneBuilderLP#1",65:"WRRenderBackend#1",69:"GMPThread",70:"ProcessHangMon",70:"mozStorage #1",71:"mozStorage #2",72:"BackgroundThreadPool #1",74:"DNS Resolver #1",75:"DNS Resolver #2",76:"HTML5 Parser",77:"mozStorage #3",78:"IndexedDB #3",79:"IndexedDB #4",80:"SSL Cert #1",87:"SSL Cert #2",83:"IndexedDB #5",84:"DOM Worker",85:"DOM Worker",86:"BgIOThreadPool #2",89:"StreamTrans #58",93:"StreamTrans #62",87:"URL Classifier",88:"ExtensionProtocolHandler",91:"IndexedDB #6",92:"mozStorage #4",94:"StreamTrans #65",94:"DOM Worker",95:"RemoteLzyStream",97:"SSL Cert #3",99:"SSL Cert #4",98:"StreamTrans #70",115:"StreamTrans #87", Throttleable: 1 TotalPhysicalMemory: 8589934592 URL: about:preferences UptimeTS: 13.166666666666666 Vendor: Mozilla Version: 95.0.2 useragent_locale: en-US

This report also contains technical information about the state of the application when it crashed.

After firefox update to 100.0 - i can't use any of my addons, and cant install new one. All my current updates appears in "disabled" status, and there's no "enable" button. I have many addons, so it's the global problem.

Also, i can't install any of updates from addons.mozilla.org, i get message "Installation aborted because the add-on appears to be corrupt". All addon xpi files are downloaded without problem using "save as", also, after clicking "install" on addons website i see download progress.

Please help to resolve this issue!

As of last week, I am unable to reply in the reply sidebar in a Slack thread. When I click the reply icon associated with a comment, the sidebar opens and a loading icon is displayed for a second but then nothing happens; all I get is a white sidebar. I have updated to 99, shutdown and rebooted, opened Slack in an new window and nothing allows replys. I am running Windows 10 Pro, build 1903, 64 bit, i5 processor, 16 GB RAM. Suggestions?

Hi everyone,

Up until the latest FF release, opening an .ics (calendar file) link defaulted to the OS's preferred application; in my case Outlook. Now, every time I click on an .ics link FF asks where I want to save the file. I schedule ZOOM meetings all day and heavily rely on this feature.

I tried looking in FF's Files and Applications section in settings and .ics is not even listed as a file extension. I don't know how to add it.

Any assistance is greatly appreciated.

Jose

I recently upgraded graphics cards from an Nvidia GTX 1080 to an AMD 6900XT. Since then I noticed video stuttering on YouTube while playing 4k videos, especially noticeable at 4k/60FPS (example video ). Prior to the upgrade, I was not experiencing issues.

I monitored task manager as the video was playing to see CPU usage, which was sitting at 25% (4 core 8 thread CPU). GPU usage was fluctuating from 1-3%.

I tried resetting all the changed configuration options in about:config, removing all add-ons, "Refreshing" Firefox, and ultimately uninstalling and reinstalling. Nothing has worked so far except for "Troubleshooting mode" in about:support. In that mode, I experience no stuttering and GPU usage rises to 25-35% with the video playing, even before I reinstalled.

This most likely isn't a networking issue as the "Stats for nerds" option on the YouTube video shows I have 10-20s of buffer while the video is still stuttering.

I would like to find out what's different about Troubleshooting Mode that is not giving me the same problem while in "Normal Mode". Any advice?

For about a month how I find that the Firefox download list opens by itself multiple times during the day. Most of the time I'm not even actively using firefox, it's just idling in the background. When it first happened I figured it'd be a quickly patched bug and so didn't ask around about it. But I've had a ff update since then and it still happens. Does anyone know why this is happening? I have not seen reports of this via search.

I'm on ff 9.0.1.

This sounds like it's a Meetup problem, and in fact it may be, but now I am having doubts.

The problem is that I can't upload photos to a Meetup event. (This will mostly just be a problem for Meetup organizers.) When I click on "Save photo", nothing happens. No error message, nothing. It's as if the "Save Photo" button has been disabled. Firefox is my browser while I access Meetup.com, and I have the latest and greatest version of Firefox.

I contacted Meetup and they haven't been able to solve the problem; they suggested that I clear my cache and my cookies and try again, but I get the same result. HOWEVER, when I go into Microsoft Edge, I can upload photos with no problem. So I have a work-around: use Microsoft Edge to upload photos. So my question to you centers around: why does this work perfectly in Microsoft Edge, but it doesn't in the latest version of Firefox?

To test the possibility that it's a bug on my personal desktop computer, I went to the public library and tried the same experiment, with the same result. So I don't think it's problem with my personal desktop computer.

One other piece of information: the exact same thing happens (failure to update photo, that is) when I have the photo open in another application (Photoshop), even if I try to "save photo" to Meetup in Microsoft Edge. Then when I close the other application (Photoshop in this case), Microsoft Edge lets me "save photo."

I know that Firefox really doesn't want me to try to revert to a previous version, and it makes me nervous too, but I am suspecting that something in the latest Firefox version actually introduced a problem. (Or maybe triggered a Meetup bug of some sort; I still haven't located the problem.) I've been on Meetup.com for years, I've had Firefox for years, they've worked together to upload photos in the past for years.

If you want to get into the details, below, for what it is worth, is my initial question to the Meetup support people (with whom I am still in a conversation).

- - - - - - - -

I can't upload a photo for my event. In fact, I cannot upload a photo for any event at all. I deleted a couple of photos and an album because maybe our group had too many, but that didn't work. I can't even upload a photo that I had previously uploaded to a different event, so I don't think that the problem is with the photo itself.

Here's what happens. 1. Edit the draft of my meetup. 2. Click on "upload photo." The photo is 1827 x 1009 pixels, total size 63 KB. 3. I click on "Upload photo", then in "add photo" I click on "upload photo" again. I browse for the photo and select it. 4. The "crop your photo" screen appears, with the selected photo in it. It's already the size I want, so I click on "Save Photo".(Cropping doesn't help either.) 5. Nothing happens. No error message, nothing. The only think I can click on is "cancel," which takes me out to the previous screen. - - - - - -

I saw this post https://bugzilla.mozilla.org/show_bug.cgi?id=542690 where it seems implied that it should work, but on LMDE 5 w. firefox 98.0.2 64-bit scrolling horizontally w. touchpad doesn't work for scrolling on pages nor for scrolling the tab list at the top.