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Hello,

I am experiencing an issue related to the Vanguard anti-cheat system used by Riot Games, specifically in relation to League of Legends. After installing the game and Vanguard, I am unable to open Firefox. When I try to launch Firefox, nothing happens. However, if I change the name of the firefox.exe file, I can start Firefox on a different profile, but it only works for a short period before becoming unresponsive. None of the options or tabs respond after that.

Could you please provide assistance on how to resolve this issue?

Thank you.

I've just started getting error messages that I need to enter my password to send emails. I've tried that but it still keeps saying unable to connect to the server. This has been happening for about two days now. I've tried updating Thunderbird, restarting Thunderbird and restarting my PC. None of this has worked. I made no changes to my system, software or home network. Any help would be appreciated. Thanks, Dave

I have 2 different yahoo email accounts that I access through Thunderbird. When I added the 2nd account, it changed the SMTP Server Settings "user name" of the 1st one to the same as the new one. I received an error when I tried to send an email from the 1st account, after looking at the settings, i noticed the SMTP user name was wrong. When I changed it on the 1st account, it automatically changed it on the 2nd account as well.

Lately, I have been getting a pop-up error when I start and close Firefox. The error reads: "XULRunner Could not determine any profile running in backgroundtask mode!"

I have found posts such as this one: https://support.mozilla.org/en-US/questions/1398228 and other posts suggesting to disable the scheduled task in Windows Task Scheduler, but none of the solutions have worked thus far. Anyone know of any other solutions?

Hello,

I have been facing this issue when accessing Google Drive using Firefox, after selecting a file and clicking on "File information" option the "Details" and Activity" tabs simply don't load, as you can see in these screenshots.

Also, I found this thread also here on Mozilla Support from two years ago that reports the same issue. Apparently the bug was solved but ended up returning in most current versions.

I opened the current thread just to report this bug again. Thanks.

EDIT.: Another user reporting the same, his thread was archived: https://support.mozilla.org/en-US/questions/1422875

Dear Support Team,

After updating to last Mozilla Firefox version (126.0.1) all my ngx-datatable tables are overlapping all rows over the first one even if the entire height of the table is correct calculated.

This is a blocking point. I need assistance urgently.

I have tried multiple times to add an email account to thunderbird in windows but I keep getting the error, "Unable to log in at server...". I know the details are correct as I'm copying and pasting them from my password manager so I'm not sure what the problem is.

i cant get firefox to open main page no matter what i try. Ive download it a few times and then it ask me to no let it fix it i did and then it still wont open.use firefox more than any site. ty if you can help.

Using TB 115.11.0 (32-bit) on a Windows 10 machine, with IMAP synchronization. Quite often (but not always) the synchronization of the inbox takes an extremely long time, Activity Manager showing "bringing folder inbox up to date" hanging in "downloading message 1 of ...".

I have made a Gecko IMAP:5 log and see (during this state) a pattern repeating every 2 minutes, ending in "idle mode async waiting". Then, after a long time suddenly the synchronization process finishes.

What can be wrong here?

Hi, last week my Thunderbird started slowing down and then appeared an error which caused it to freeze (i wasn't there so i don't know what error). The program was force closed and opened again, and it started re-downloading messages in the inbox (probably repairing).

For some reason it also started running all the filters and sent a ton of old emails from the inbox. I closed it again and after opening it it worked fine, and it continued downloading messages during the weekend. Today it worked fine all day until it started running the filters again. I closed it and opened it again and it continued sending emails, so i had to close it.

I'm not sure but it may have happened after making a new filter, which is strange because i have about 180 filters and this never happened before.

I'm now afraid of opening thunderbird because it may continue sending emails.

Could this be a thunderbird bug or an add-on issue? I have Send Later as well as FiltaQuilla, which i disabled the last time i opened thunderbird.

Here is a very strange problem: 1. all my notifications about interac are attributed to only one person: INTERAC e-Transfer: A money transfer from X has been automatically deposited. Under correspondents I have Y, no matter what X is. 2. When I do a global search for INTERAC, all notifications show up, but attributed to Z, different from X and Y. Further, Z only sent me an interac transfer once, maybe 10 years ago. Indeed, if I global search for Z, none of the interac notifications show up. 3. this is ONLY on Thunderbird, not at the server.

Any ideas?

I'm hoping someone can help with a conundrum.

A few years ago, whenever I first started Firefox--whether I had just started up my computer or had exited Firefox and opened it back up--it would take several minutes for Firefox to load any website (Google, Amazon, weather.com--anything). Once the first site loaded, it would load subsequent sites normally. Interestingly, it was only my default profile that was affected; if I used another profile or created a new one, websites would load within seconds of my starting Firefox.

I finally broke down and created a new default profile, imported my history/bookmarks/etc., reinstalled extensions, adjusted settings, etc. The new profile behaved nicely, loading the first website within a few seconds of Firefox starting. But over time, the load time has gradually increased to the point where it is now behaving just like the old profile: I load Firefox, I try to go to any website, and it takes several minutes for it to load.

Any ideas what's happening/what's the problem? Hoping someone out there has some wisdom and can help troubleshoot. Thanks!

Hello everyone! I have a really nasty problem (for almost 3 years now) that I just can't get a handle on (and I don't know the root cause 100% either). Here's my situation:

• We have a self-check-in terminal (kiosk) that is used in hotels
• The terminal runs a web app in FF full-screen kiosk mode (-kiosk flag)
• 99% of the time everything works fine and without any problems
• Sometimes though, the problem occurs that the entire browser content no longer responds to touch events
• My app continues to run, we see the visual feedback from the touch monitor, but Firefox no longer responds to anything
• If you connect via AnyDesk (our remote maintenance tool), you can click with the mouse
• Even the DevTools don't respond to touch interactions
• As I said, everything is fine via mouse interaction (remote)

What I have already tried:

• Disable hardware acceleration
• Browser restart every day at 4:00AM (so far so good, but it still happens sometimes in between of these restart windows)
• Set the widget.windows.window_occlusion_tracking.enabled to "disabled" - I read that the problem could be related to that

Does anyone know the problem and can help me? It's really critical for our business, as the guest cannot interact with the device and only a browser restart helps.

One more thing: I saw today that a second Firefox.exe process was running. After killing it, it worked again. What kind of process could it be that is affecting the main app so much?

THANK YOU

This pops up every few hours. Sometimes it pops up invisible but steals focus from the main window. How can this be disabled?

I tried all methods that have been mentioned everywhere on the Internet, including policy.json, Group Policy on Windows, etc. Nothing disables this nagging yet.

Hi. I have to sign in related problems.

I can't Sign in to my work planning website: tjeps.g4s.dk/ESS/. It works fine on Firefox for Windows but on Android I get a new Sign in formular every time i try to sign in. Works on Chrome for Android.

The mandatory Authenticator app in Denmark for all public services "MidID" is not supported on Firefox for Android. Works on Firefox for Windows. This is a huge problem if you wan't Danish users. Also works on Chrome for Android.

I wan't to leave the Google Chrome browser but I am kinda forced not to.

-Jimmie

I've read a few historic suggestions about how to resolve this, but I haven't been comfortable with what solutions were suggested as they didn't seem to comprehensively answer the questions, I'm afraid.

Until this morning's attempts to resolve the "running out of disk space" warnings, I had two mail accounts on Thunderbird - my old Hotmail account and my new personal domain based account. Both accounts had old emails (3/4 years' worth) filed locally on my PC pending my satisfaction that the new mail account was working satisfactorily. To try and resolve the storage issue, I deleted all the locally stored emails from my Hotmail account from within Thunderbird, then deleted the Hotmail account, and restarted both my PC and Thunderbird.

The expected reduction on space occupied by the .thunderbird folder didn't materialise - at all.

How can I get back the space so I can continue working, please?

Hello! Since I couldn't find help in the forums, I will create a new question. For about a year now the PC at my work will not open mailto-links correctly. There is no account to select from, the subject has a lock-symbol. The receiver's address is correct though (I replaced it with "address" for the screenshot). This PC is the only one I know with that problem and only with external mailto-links. If I click on an email address inside a mail, it opens it correctly. Thunderbird version 115.11.1 (32-Bit), Win 10

It's pretty impractical, so I am hoping for help. Thank you!

I have Thunderbird 115.11.1 running on a Mac Mini M2 Sonoma 14.5.

I use a Kensington USB PC Keyboard which is set to "British-PC" in the Mac Keyboard settings to give the correct layout.

If Thunderbird is the first app I launch after I log in (the password entry at this stage works fine) it seems to stop the keyboard from being recognised by the Mac until I go into another app (Google or Text Edit for instance) which then seems to make the Keyboard visible again.

Are there any settings in Thunderbird that might clash with the system keyboard settings and cause this?

If I use other apps before launching Thunderbird it works as normal, it seems to happen if Thunderbird is launched first.

Thanks for any help.

Hi, just upgrade to Windows1 and did a new installation from Thunderbird. latest version 115.11.0 (32-bits) But the new messages are almost directly market as read even with setting mark messages automatic as read set to no? On a other pc with Windows11 I had the same problem with the 64bit version but going to the 32bit version solved the problem. Any Idea how to solved this problem? Regards Karina

I am trying to add an mp4 video to my website using the following code:

<video width="320" height="240" controls>
  <source src="images/###.mp4" type="video/mp4">
</video>

where ### is the name of the video file. I get the following error message:

"No video with supported format or MIME type found."

In the console the following is displayed:

"Media resource http://127.0.0.1:5502/images/###.mp4 could not be decoded. video.html All candidate resources failed to load. Media load paused. video.html Media resource http://127.0.0.1:5502/images/###.mp4 could not be decoded, error: Error Code: NS_ERROR_DOM_MEDIA_METADATA_ERR (0x806e0006)"

Runs just fine in Chrome and I have no pop-up blockers installed. Autoplay is set to be allowed for all websites.

Windows 11 version 23H2. Firefox version: 126.0 (64-bit)