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First, let me describe the configuration I have been using successfully for two decades -

I am on the latest release channel release with a POP3 configuration.

I keep the message store on my file server and have Tbird installed on it and my laptop. The file server is a Win 11 machine as is my laptop. Each machine points to the message store (including the config file) on the file server.

Of late, every time I try to use Tbird on the file server, I get "You have launched an older version" message. So far reinstalling and pointing to the existing message store works.

But I am getting bored with having to reinstall every time, and I suspect this will eventually break completely.

Is there a way to stabilize this?

Thanks Jonathan

I have noticed that since around Friday, April 24th, 2026, that Youtube videos will sometimes refuse to load properly. The page for the video will come up, but buttons on the page will not load, and nor will the video. This started happening around mid-day, when prior to it, things had been fine. At first I thought it might be tied into the 'ambient mode' option on Youtube itself., But even after shutting that off, I found it was still happening at ranodm.

Is this something new Yotube is doing in their continued (idiotic) fight against ad blockers, or is there an actual glitch in the browser or, more likely, a glitch in Youtube? Like I said, this seems to occur at random and I can't trace the cause for it. I'll include a screenshot of what I'm seeing. But if anyone knows what's happening here, I'd appreciate it.

I should add that I am on Windows 11 and using the new version 150.0 for Firefox. (Congrats on that, by the way.)

I'll be honest, I keep hearing some other browser can block youtube ads innately. (Brave, I think it was called?) and while the idea is cool, I'm not giving up a browser I've used for over 20 years for it. If Firefox can find a way to implement a similar means of blocking Youtube ads innately, I;d love it. But for now, I just wanna know what the devil is happening with the site. Can anyone help?

I can open gmail but it does not refresh. If I clear the cache it refreshes the first time only. Sometimes I get a message saying that my account is temporarily unavailable but I can access gmail with no problem on my iPhone, android tablet and with Google Chrome without any problems. Turning off the Advanced Tracking does not resolve the problem.

Please see attached. Netflix will not work. Never had a problem with any other videos so far using this amazing browser. Can we please get a possible update timeline for this - if possible at all?

thanks

The Firefox Color extension (which says "Official extension built by Mozilla.") has made it so that when I right click a link and select bookmark link, the menu for choosing which folder to place the bookmark is forced to be dark mode. Due to how few sites I use dark mode on, this sudden reversal of colors makes it hard to read. I tried changing every setting to blue but none of them seemed to effect it. I couldn't find anywhere on the extension page to ask about this without leaving a review so I found my way here. How do I fix this, and if I can't, when is it going to be fixed?

'bold text YouTube is "acting insane, sound plays/picture is frozen. Can't pause it. Also can't start it! Ads play on without option to skip. I got some notice that YT was changing something, I think it is broken. I managed to get a video to play on MS Edge, but I normally do not use that. I cleared cache and ALL of that, rebooted computer, etc. connection is good. Searches are fine on firefox, Other sites are fine on firefox. . IT IS YOUTUBE! It is SO bad that now with my mouse, the arrow and hand are NOT showing up on the actual screen where video plays. Right now on here it is fine. but on youtube? no.

I cannot find the menu item on my mobile device to sync my Firefox account. When I select "menu" it doesn't have that as an option; it only shows me other topics I have used Firefox to search.

Speakers are not muted. When I play a youtube video in Firefox I don't hear anything but if I play the same video in Chrome it works fine. I really prefer Firefox but I occasionally need to use my browser for Teams meetings and the audio doesn't work.

I'm currently running Thunderbird 140.9.1esr and it shows an update available to version 140.10.0esr. However, when I click on the update button, it shows "downloading" but it stays at 0 bytes and will not download the update. All previous updates to my current version automatically downloaded and installed after I clicked on the update button. How do I fix this or is there a problem with 140.10.0esr? Thank you!

Settings for font do not help. Font now looks very thin and almost blurry. Not clear, dark lines like always in the past.

My setting are Arial size 16. Under advanced, it show Arial Monospace size 13.

I have set my phone to switch between light and dark mode on schedule. Everytime it does so, Firefox doesn't theme refresh correctly. Usually, the search bar will be on the old theme and I'll need to close Firefox as an active app and restart it to refresh correctly. This also means websites looking for theme refresh signals from the browser do not pick it up correctly and thus the browsing experience is visually jarring. This issue has been around for more than a year. Reinstalling Firefox hasn't helped. This is a bug in the browser code and can be reproduced on my Android tablet as well.

I have Thunderbird on another PC that shows the incoming emails with the contents with the contents displayed under the email list, yet on my new PC I cannot seem to get that setting. I have to double click an email and it opens a new tab. I have used your help and also YouTube to no avail.

Since updating to version 150 (and 150.0.01) my title bar is missing. Sure, I CAN get it back with F11 (2 times) but it is annoying to have to do that every single time I start FF.

There is no longe an option (to checkmark or remove checkmark) in the right-click menu to show the title bar. (it used to be an option) I want the option to have it there permanently, or not. It should be up to me, not some dev somewhere that does not like it.

after working in firefox for a while and using a number of windows and the I close firefox with multiple windows open in my session. if i open it again and keep doing this for a while and then have closed firefox, eventually I can no longer open a firefox window and get a message the I have too many windows opn and can't open more till i close the open windows. i hover over the firefox app and all the previously closed windows are stacked up. why didn;t they close when i exited my firefox sessions. why are they still there and clogging up the system?

I'm trying to use the built-in VPN for Firefox, but when I try to click the "Get started" button, nothing happens. Is the service simply not available for me yet? I live in the United States, for reference.