All Products Support Forum

Thunderbird v31.4.0 Linux Mint Debian Edition 3.1.2-amd64 Cinnamon 2.0.14

When clicking on a link within an email, the system crashes and the monitor display displays jagged, diagonal lines. A cold boot is required. This can be repeated.

Same results running in Safe Mode.

Any ideas?

I am using Thunderbird version 31.7.0 and it keeps randomly crashing when usually when I try to send an e-mail. The e-mail appears to go out, but it is not copied to my send folder. I can keep it working is I use safe mode.

My Crash links are: https://crash-stats.mozilla.com/report/index/9e388085-aa3d-454c-bf55-924102150612 https://crash-stats.mozilla.com/report/index/2613f4fa-89d4-49c3-92ad-4f3292150612 https://crash-stats.mozilla.com/report/index/a5f726e5-8f62-40a9-9087-4bab92150610

Hopefully someone has an idea how to fix this. It appears every crash is for the same reason.

Thank you for your help.

Updating to version 38.1.0 Start Thunderbird, Starts up OK. Can view messages and write new emails etc OK. If I select "get messages" OR messages are accessed automatically every 5min. then the whole PC crashes. Three finger salute does not bring up task manager. Only way out is to power cycle.

Thanks in advance for your help Cheers Pete

Follows is the Help Troubleshooting info.

 Application Basics

   Name: Thunderbird
   Version: 38.1.0
   User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0
   Profile Folder: Show Folder

             (Local drive)
   Application Build ID: 20150707103124
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Memory Use: about:memory

 Mail and News Accounts
   account1:
     INCOMING: account1, , (none) Local Folders, plain, passwordCleartext

   account3:
     INCOMING: account3, , (pop3) pop3.talktalk.net:110, plain, passwordCleartext
     OUTGOING: smtp.talktalk.net:587, alwaysSTARTTLS, passwordCleartext, true

 Crash Reports

 Extensions
   Lightning, 4.0.1, true, {e2fda1a4-762b-4020-b5ad-a41df1933103}

 Important Modified Preferences

   Name: Value

     accessibility.typeaheadfind.flashBar: 0
     browser.cache.disk.capacity: 358400
     browser.cache.disk.smart_size_cached_value: 358400
     browser.cache.disk.smart_size.first_run: false
     browser.cache.disk.smart_size.use_old_max: false
     extensions.lastAppVersion: 38.1.0
     font.name.monospace.el: Consolas
     font.name.monospace.tr: Consolas
     font.name.monospace.x-baltic: Consolas
     font.name.monospace.x-central-euro: Consolas
     font.name.monospace.x-cyrillic: Consolas
     font.name.monospace.x-unicode: Consolas
     font.name.monospace.x-western: Consolas
     font.name.sans-serif.el: Calibri
     font.name.sans-serif.tr: Calibri
     font.name.sans-serif.x-baltic: Calibri
     font.name.sans-serif.x-central-euro: Calibri
     font.name.sans-serif.x-cyrillic: Calibri
     font.name.sans-serif.x-unicode: Calibri
     font.name.sans-serif.x-western: Calibri
     font.name.serif.el: Cambria
     font.name.serif.tr: Cambria
     font.name.serif.x-baltic: Cambria
     font.name.serif.x-central-euro: Cambria
     font.name.serif.x-cyrillic: Cambria
     font.name.serif.x-unicode: Cambria
     font.name.serif.x-western: Cambria
     font.size.fixed.el: 14
     font.size.fixed.tr: 14
     font.size.fixed.x-baltic: 14
     font.size.fixed.x-central-euro: 14
     font.size.fixed.x-cyrillic: 14
     font.size.fixed.x-unicode: 14
     font.size.fixed.x-western: 14
     font.size.variable.el: 17
     font.size.variable.tr: 17
     font.size.variable.x-baltic: 17
     font.size.variable.x-central-euro: 17
     font.size.variable.x-cyrillic: 17
     font.size.variable.x-unicode: 17
     font.size.variable.x-western: 17
     gfx.direct3d.last_used_feature_level_idx: 1
     mail.openMessageBehavior.version: 1
     mail.winsearch.firstRunDone: true
     mailnews.database.global.datastore.id: 268c1c45-39c9-4fb8-af58-00e0c832e32
     network.cookie.prefsMigrated: true
     network.predictor.cleaned-up: true
     places.database.lastMaintenance: 1436862237
     places.history.expiration.transient_current_max_pages: 104858
     plugin.importedState: true

 Graphics

     Adapter Description: Intel(R) G41 Express Chipset
     Vendor ID: 0x8086
     Device ID: 0x2e32
     Adapter RAM: Unknown
     Adapter Drivers: igdumd64 igd10umd64 igdumdx32 igd10umd32
     Driver Version: 8.15.10.2302
     Driver Date: 2-11-2011
     Direct2D Enabled: false
     DirectWrite Enabled: false (6.2.9200.17292)
     ClearType Parameters: Gamma: 2200 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 50
     WebGL Renderer: false
     GPU Accelerated Windows: 1/1 Direct3D 11 WARP

     AzureCanvasBackend: skia
     AzureSkiaAccelerated: 0
     AzureFallbackCanvasBackend: cairo
     AzureContentBackend: cairo

 JavaScript

 Incremental GC: 1

 Accessibility

   Activated: 0
   Prevent Accessibility: 0

 Library Versions

     Expected minimum version
     Version in use

     NSPR
     4.10.8
     4.10.8

     NSS
     3.19.2 Basic ECC
     3.19.2 Basic ECC

     NSS Util
     3.19.2
     3.19.2

     NSS SSL
     3.19.2 Basic ECC
     3.19.2 Basic ECC

     NSS S/MIME
     3.19.2 Basic ECC
     3.19.2 Basic ECC

I have updated to Thunderbird 38.1 running with XP Pro. Thunderbird fails/crashes every time I switch users. We have 3 account profiles and failures occur on all 3 profiles.

Crash reports cannot be sent to Mozilla as errors in transmission occur.

While Thunderbird is working it is good but the constant failures are frustrating.

The last auto upgrade included a calendar function, which I switched off as I thought this was causing the problem. But now after all the messages have downloaded, I get the usual pop-up box in the bottom right of the screen telling me I have received x messages but it only half fades in and the whole PC jams. CTR-ALT-DEL does not work and I can't switch to a different window or even click on anything in the Thunderbird screen. The only thing that I can do is hard reboot the PC and switch off the router, which allows me to start up Thunderbird without anything downloading. I am using Windows 7 and Avast as my AV. Any help would be gratefully appreciated.

Thunderbird updated automatically last week. It crashed my computer (not just the program) every time the new email notification box came up. I turned off notifications. That helped, but if my computer loses connection to the internet, Thunderbird crashes. The program is incredibly slow and unstable. When I click on an email, I end up with parts of two windows. Eventually, the system catches up and the screen looks fine. If I try to draft an email, I again get parts of two windows until it catches up.

Thunderbird has been among my all time favorite programs. I have used it for years and have never had any issues until this update. Help!

Until several weeks ago, new windows created through Javascript with window.open() worked. We could pass the new size, and other features, e.g. menubar, toolbar, etc. and they would show up. As of v.76.0 this is no longer true. The parameters are ignored. If we use no parameters, the menubar, etc. do show, but we can't control any new window features. We have not changed our programs at all, and window.open() parameters still work correctly in Chrome, Brave, Edge, etc. How do we get Firefox to recognize the window.open() parameters (again)?

Dear community,

in the past, I have noticed that a few e-mails - but not all - are displayed incorrectly as plain text instead of the usual HTML-text. This means that there is no formatting involved, e.g. the font art is not correct. As it seems, the issue occurs when the standard formatting options of e-mails are used by the senders. So if nothing is changed like the font size or colour. If I look at the e-mail on different e-mail programs, everything is alright. I have already ensured that the option View > Message Body As > Original HTML is enabled.

Thanks in advance for your advice. batengo

Hello Whenever I start a download, it immediately crashes, no matter what you do all downloads fail. Tried solutions that didn't work:

• refresh ff,
• delete profiles,
• uninstall + reinstall.

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 used to be a Mozilla add-on that supported the roll-out of DoH, but now only exists as a stub t","name":"DoH Roll-Out","userDisabled":false,"appDisabled":false,"foreignInstall":false,"hasBinaryComponents":false,"installDay":18979},"formautofill@mozilla.org":{"version":"1.0.1","scope":1,"type":"extension","updateDay":18979,"isSystem":true,"isWebExtension":true,"multiprocessCompatible":true,"blocklisted":false,"description":null,"name":"Form Autofill","userDisabled":false,"appDisabled":false,"foreignInstall":false,"hasBinaryComponents":false,"installDay":18979},"pictureinpicture@mozilla.org":{"version":"1.0.0","scope":1,"type":"extension","updateDay":18979,"isSystem":true,"isWebExtension":true,"multiprocessCompatible":true,"blocklisted":false,"description":"Fixes for web compatibility with Picture-in-Picture","name":"Picture-In-Picture","userDisabled":false,"appDisabled":false,"foreignInstall":false,"hasBinaryComponents":false,"installDay":18979},"proxy-failover@mozilla.com":{"version":"1.0.2","scope":1,"type":"extension","updateDay":18979,"isSystem":true,"isWebExtension":true,"multiprocessCompatible":true,"blocklisted":false,"description":"Direct Failover for system requests.","name":"Proxy Failover","userDisabled":false,"appDisabled":false,"foreignInstall":false,"hasBinaryComponents":false,"installDay":18979},"screenshots@mozilla.org":{"version":"39.0.1","scope":1,"type":"extension","updateDay":18979,"isSystem":true,"isWebExtension":true,"multiprocessCompatible":true,"blocklisted":false,"description":"Take clips and screenshots from the Web and save them temporarily or permanently.","name":"Firefox Screenshots","userDisabled":false,"appDisabled":false,"foreignInstall":false,"hasBinaryComponents":false,"installDay":18979},"reset-search-defaults@mozilla.com":{"version":"2.1.0","scope":1,"type":"extension","updateDay":18996,"isSystem":true,"isWebExtension":true,"multiprocessCompatible":true,"blocklisted":false,"description":"Ask the user if they would like to use a specified search engine as the default.","name":"Reset Search Defaults","userDisabled":false,"appDisabled":false,"foreignInstall":false,"hasBinaryComponents":false,"installDay":18996,"signedState":3},"webcompat@mozilla.org":{"version":"28.0.1buildid20211210.021657","scope":1,"type":"extension","updateDay":18996,"isSystem":true,"isWebExtension":true,"multiprocessCompatible":true,"blocklisted":false,"description":"Urgent post-release fixes for web compatibility.","name":"Web Compatibility 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.

Greetings. I can't open most sites I usually visit (even google.com) via my Firefox 98.0a1. This happens since today. All error codes are SEC_ERROR_LIBRARY_FAILURE.

Tried to:

• Disable DNS-over-HTTPS.
• Disable HTTP/3.
• Disable proxy (never had it enabled anyway).
• Disable sending info to Firefox developers.
• Change settings of DNS-over-HTTPS.
• Restart the browser (after each action).

Nothing helps me... But I still can visit some websites, but most common resources are not working for me. Please help me because I can't use Microsoft Edge without getting mentally ill. :/

Somewhen before or with 91.2.1, the default action when opening an existing email became "Edit draft message." (W10 19043, synching to GMail) That setting is nonintuitive and just wrong. A default should NEVER be an action that commits to an irreversable behavior path. Please fix.

This extremely bad design "feature" has apparently been around quite a while and generates exactly the problems returned by a search here on "delete attachments Thunderbird." I first noticed the behavior just about the time GMail introduced two-factor authentication. Maybe no connection there, but ...

Hi,

TB 91.5.0 on Windows 10 (with profile folder excluded from virus scan)

The latest update to seems to have resurrected a problem with saving copies of sent emails. Sending works fine, but copying of the sent email to the sent folder causes the send dialog to hang. Disabling the "Place a copy in:" option in account settings eliminates the problem. Using the "Other" option to place it in a local folder works *that is not part of a unified folder* works OK.

I have tried repairing folders and deleting the sent files inside "smart folders" in the profile, with no luck.

Older details here: https://support.mozilla.org/en-US/questions/1363781

Thunderbird keeps asking me to compact folders, c.f. the attached screenshot. Meanwhile, I also checked the profile files under AppData\Roaming\Thunderbird\Profiles, the whole folder of the profile files has only 24.2 MB (25,477,204 bytes).

I can not get thunderbird to bring over email for 6 days now I get the following error everytime. (Sending of password for user .........................@verizon.net did not succeed. Mail server pop.verizon.net responded: [SYS/TEMP] Server error - Please try again later.) I have tried creating a new password on the server account and restarting thunderbird with the new password . Did not help. Any Suggestions?

Hi, I've recently noticed that Firefox is not using Intel Graphics for hardware video decoding, here are the specifics:

- I tested this on two separate PC - one laptop with dual GPU (an Intel UHD 630 and NVIDIA GTX 1070) and one desktop with dGPU removed (leaving only an Intel UHD 630 by i7-9700K), on both PC I made sure to run Firefox on Intel GPU only. - According to information I gathered online, Intel UHD 630 should support H264 decoding and VP9 decoding without any problem. - I tested videos from Youtube (VP9, non-HDR video) and Twitch (avc/h264 video) - The exact same video, when played on Microsoft Edge (Chromium), uses Intel's hardware decoder without any problem. - On the dual GPU laptop, when being forced to run on NVIDIA's GPU, Firefox correctly uses the NVDEC decoder without any problem. - Both PC uses the latest Intel driver (30.0.101.1191)

I have attached copies from about:support page below.

In Firefox settings, under General -> Performance section, I have left "Use recommended settings" checkbox on.

Could someone help?

Using TB v91.5.1 on Windows 10 x-64. I have several mail accounts, one of which is for a hotmail.com address. This has been working fine for years, but over the past couple of days, I don't seem to be able to send emails form this account. I can receive them fine, but when I try to send, I get the small pop-up telling me it's sending the message, and the progress bar is at 100%, but it doesn't send the message, it just sits there.

I looked in the error console, but nothing was added when I tried sending.

You can see my server settings for the account in the attached image.

Any ideas? Please let me know if there is any other info you need.

Thanks

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)

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