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Dear helpers,

I want to upgrade the hardware of a friend - and so I moved the homedir of the user to the new system, as I have done every time before in my life. But in this special case Thunderbird will not start with the used profile.

Thunderbird generally starts with e.g. the -P switch. But it will not start the default profile of the user. I tried to go this way concerning the versions 115 -> 128 -> 140 without success. I deleted all lock files, if there were any. I spent a lot of time with e.g. copilot - but it could not help me. I'm at a loss.

Is there any documentation with a kind of step-by-step instructions? Can you give me a hint, please?

Here are the details:

Source: linux mint 20.2 uma Thunderbird 115.18.0esr 11th of december 2024

Destination: linux mint 22.3 zena Thunderbird 140.7.0esr

Thank you in advance for your help.

I am unable to sign in to my yahoo mail account. It gives me a fault that "something went wrong, please try another device". I can use brave as my browser and sign in with no problem but not with firefox. Any idea why?

Have deleted install pkg from W10 computer (PC). Figured if all was deleted new install would be easy. But, I keep getting message" Your Thunderbird Profile cannot be loaded. It may be\ missing or inaccessible"

If I have deleted all attempts at installing how can I need the profile? Wouldn't it be created in the new install. What specific files or folders should I be looking for? I have referred to "How do I find my Profile? and associated documents. and uninstalling the Firefox file from the MS apps list doesn't seem to clean this message trigger.

Frustrated after 5 tries...

I am so annoyed, MS clearly sabotage this to push people back to their horrific software! I am so against that idea I lost an entire full work day today trying to do something SO simple, to install Thunderbird (for a friend) and connect it to MS365 email address.

It's IMAP, it should have taken SECONDS! It did create it, pulled in tons of email, but refuses to SEND any! I tried every single suggestion I could find online, going back years. NOTHING works! All i get every time whne sending email is : "Login to server smtp.office365.com failed. "

Does anyone have a magic cure, 6 solid hours of this and I still refuse to give up hopes of making Thunderbird the active mail client! Thanks

I changed my PW in the Yahoo browser. I'm on a Google pixel. I don't have Tbird on my laptop. I am trying to get back into my Yahoo mail through Tbird, buy don't see a way to change it there

I can't sign in to gmail as I used to for years. (It works ok when I use Private Browsing, but that's inconvenient.)

WHAT USED TO HAPPEN: when I was at the sign in page, my password manager (Dashlane) filled in the username and then a screen asking to use the passkey. I said yes, and got in to Google with no problem.

NOW: the password manager fills in my username (my name at gmail.com) and when I hit "NEXT" in the sign in field I get email or phone l.com When I click in the field that disappears and my username appears. When I hit NEXT it goes back to "email or phone l.com". Same when I hit return. Same when I enter my phone number. SO maybe it's Dashlane (my password manager)? But when I disable that and TYPE my username (or phone number) in the field, same stuff happens.

BUT when I use a private browser window, the gmail sign in works as before, and so that's what I've been using -- but it's not convenient having 2 windows open. Before it was just a tab in one window. What changed? Why? Can I change it back? Thanks!

Firefox won't save my gmail password. I don't know how that is done. When I sign in to [edited from public] @gmail.com, firefox never asks me to save the password. What can I do?

Friday February 6, 2026

Been using Firefox since 2014 and as my primary browser for personal research, etc. and Google's Chrome about half the time for company-related work. It's been my favorite browser. I'm using the current updated Firefox 147.0.3 (aarch64) and and Apple's O/S macOS Sequoia Version 15.7.3.

However, for at least 8 months or more now, Firefox has become completely unreliable for downloading files to save on my virtual drive in my MacBook Pro M3 Max because it often if not always freezes up in the process. I have to curse again (!) then Force Quit, reboot, and everything instantly comes back up on the monitor as if nothing happened, only of course I did not accomplish the task of downloading and saving the file I needed to handle.

I have discovered by talking to folks and by researching Firefox's support information library that I'm "not alone".  Not by far.  This problem IS a Firefox issue.  I've tried to follow Firefox's several different solutions to overcome whatever the root cause of the problem is, but without success.  The TIME required to really go through this problem-solving process is a killer.  And, yea, since I'm physically practically in OPEN AI's backyard, I have consulted CHAT GPT and it also confirmed this issue between Firefox and Apple's O'S macOS Sequoia Version 15.7.3 and practically gave me a Masters thesis about.  Who has time for this?  Why can't Firefox solve this problem to make this easy for us?

S0 now, before I update my O/S to macOS Tahoe 26.3, does anyone know if between Apple and Firefox this problem has been solved? For 10 years it was never a problem. What the heck happened? Firefox is no longer my primary browser, for I never know for sure whether or not I'll need to download and save to my Mac's virtual drive a file.

Thanks for any constructive comments anyone may make! And Happy Friday. ~ GPB

I set up my new tab (after the Home page which was Google News for my profile) to show shortcuts in four rows. Clicking on these shortcuts opened the URL for an account or webpage. I "pinned" or "dismissed' these shortcuts over time. Somehow, I lost every shortcut and cannot seem to figure out how to recreate this.

I have been using 1Password 7 to manage my login credentials. It includes a Firefox extension to fill in account names and passwords in login alerts and pages.

Firefox 147.0.1 (macOS aarch64) in January 2026 has broken 1Password 7's ability to fill in account names and passwords.

To reproduce: 1. Install 1Password 7 Version 7.9.11 (70911000) and its extension version 4.7.5.90 in Firefox 147.0.1 on macOS. 2. Visit a URL for which 1Password 7 has login credentials. 3. Click on the toolbar icon for 1Password 7. A 1Password 7 dialogue box pops down from the icon, containing the username and password for that URL. 4. Click the Autofill button in that dialogue box.

Observed behaviour: 1. Username and Password fields remain blank.

Expected behaviour: 1. Username and Password from 1Password 7 appear in the Username and Password fields.

For approximately the last three months, there was a partial failure similar to this. 1. 1Password 7 popdown dialogue moves from the toolbar icon to the Firefox tab for that URL. 2. Username and Password fields remain blank. 3. Workaround: click in the username field, then tab 2-4 times to further UI objects in the login credentials form. Then click the 1Password toolbar icon, then click the Autofill button in the popdown dialogue. Then, the Username and Password from 1Password 7 appear in the Username and Password fields.

The expected behaviour occurs for the same URLs in Safari.

Thus I suspect that Firefox has somehow changed its behaviour in the last few months to cause this regression. I have not changed the 1Password software versions in this time, because I am intentionally using a previous version of 1Password.

I am looking for a fix or workaround which works with my current 1Password software version. I am not interested in a solution which requires me to upgrade to the current version of 1Password. (The current version of 1Password imposes a feature which I am resisting.) I realise that this reduces the chance that I can persuade the Firefox team to find and correct this regression.

I am getting started with TB and Exchange with the OWL plugin (https://services.addons.thunderbird.net/en-US/thunderbird/addon/owl-for-exchange/versions/). None of my filters seem be working. From what I determined from ChatGPT, certain body-oriented filters aren't supported. However, I'm just trying to do a simple filter on a sender (see attached image), which as I understand it *should* work.

Can someone confirm that filters like this either work or *don't* work for you? The OWL docs are very light on this: https://support.beonex.com/help/en-us/4-features/23-unsupported-feature

Thanks in advance!

I have two emails linked in Thunderbird. My default one works fine, but my secondary one started opening emails wrong yesterday. Every email I open, instead of just being able to view it/read it, it opens it into a composing email (like I am replying back to the email or even replying back to myself instead of just trying to read it) I looked at all of the settings between the two accounts and can't find any differences. HELP!

I have Thunderbird 142-esr on a Windows 11 computer with two users in separate Windows users account. The second user (my wife) suddenly had her gmail login stop working on TB, even though it continued working on all other devices. The symptom was that the inbox would hang trying to log on to gmail, although no error messages appeared.

My account worked normally throughout this time.

After trying less destructive fixes such as closing the application, logging off, and restarting Windows, I guessed there was an issue with her account, possibly a corrupted file. So I deleted her gmail account. When I tried to create a new account, TB accepted her credentials and the Google login came up. I successfully authenticated to Google, but installation failed when I returned to the TB new account screen. After a long wait, TB issued an error message saying the password or user name was bad.

I did two tests to isolate the problem. First, I attempted to install my wife's gmail account in my Windows TB instance. That failed in the same way. Second, I attempted to install my gmail account on her Windows instance. That worked. I concluded there was nothing wrong with her instance of TB. I thought it might be an issue with her password, although Google has never asked her to change it, and there haven't been issues logging on outside of TB. Her password did not meet Google's current requirements, so I changed it to 12 characters, mixture of upper/lower case, numerals, and special characters. That worked.

Unfortunately, during the process, I lost her settings, and it took a while to recover them from backup media.

I'm posting this more to ask if others have experienced such a problem than as a request for help, as I think the underlying issue is now resolved. Because it may be some kind of malignant interaction between TB and gmail, I thought it might be worth reporting as well.

I have been using Mozilla Thunderbird for decades and they have even contributed a small amount of money to Thunderbird periodically. Just within the last two or three days all of a sudden I have been unable to send emails with my phone. I receive emails, but I do not send them. So I opened up a laptop where I did not have Thunderbird and set it up properly through Spectrum using the incoming and outgoing servers as mail.twc.com. and yes, just like on my phone. I continue to receive new emails, but even with the laptop I was unable to send an email. I received the message"send message error sending a message failed. The message could not be sent because the connection to outgoing server smtp mail.twc.com was lost in the middle of the transaction. Try again."I contacted Spectrum twice and both times they had me try to send a message through their Web server spectrum.net and that message did go through. Of course then their response is that this has to be a problem with the third-party app meaning Mozilla Thunderbird, and they can’t help with that at all. I sure would appreciate some help because I hate to walk away from Thunderbird as well as change my email address after all of these decades.

Device: POCO M6 PRO 5G Device Model: 23076PC4BI Android version: 15 AQ3A.240912.001 Firefox version: 147.0.3

Issue description: Firefox for Android stops playing audio and video in the background whenever I switch to a new tab or move the app to the background.

This happens on multiple websites such as YouTube,YouTube Music, Spotify Web Player, and other media streaming sites. As soon as Firefox is not in the foreground, playback pauses automatically. this issue persist in every media playing sites.

Steps to reproduce: 1. Open Firefox on Android 2. Play any video or music (for example on YouTube or Spotify web) 3. Open a new tab or switch to another app 4. Audio/video stops immediately

Expected result: Media should continue playing in the background, similar to other browsers or previous Firefox behavior.

Actual result: Playback stops as soon as Firefox loses focus or is sent to background.

Additional information: - Happens every time - Tried restarting phone and reinstalling Firefox - Battery optimization settings disabled for Firefox - Issue does not occur in other browsers