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I upgraded my system to Kubuntu 26.04 LTS and started Thunderbird. The window where messages are listed was covered with Thundrbird presentation asking for donation. Only edge of one message is seen above the presentation and I cannot get to the list

Which dictionary are we using? (Or are we allowing English spelling to be supplanted with American or other spelling?)

Whereas in MS Windows I can choose UK English or one of the many different forms of English in use elsewhere, I'm noting that in Mozilla/Firefox I get the typical warning under a spelling that does not equate with the spelling used in the current dictionary and yet these spellings are not UK English...

Even I choose UK English as my default dictionary the spelling of "colour", "neighbour", aluminium, still give this indicator.

under the new nova ui style, settings ui now has a left hand column listing the settings categories available the selected catqgory is highlighted in a light purple color. not a fan. how do I change the color. don't mind collateral damage as not a fan of this color.

Hi I am using TB 156.0 (64-bit) on Linux. I guess there was an update t TB and now when I reply or forward an email, the font size of the text is tiny. I also found that the font size for just viewing the body text of an email was tiny, but I was able to fix that. But for the font size in the body of a reply or forwarded email is tiny and I have gone thru all the settings for hours with no luck. Any help much appreciated.

I don't think I have the only decisive factor when switching from Chrome/Chromium-based browsers to Firefox - this is precisely the lack of support for web progressive applications. They are very convenient to use those sites that people use every day (YouTube, Reddit, Canva, Figma, GitHub, ProtonDB, etc.). I would really like you to add such mechanics from chromium-based browsers - this would change the situation very much when choosing "which browser to use?". I'm a Linux user, particularly Fedora, so I'm often helped by PWAs to use the same Instagram, Canva, Figma, GitHub, Reverso Context and others as if they were separate applications on a computer. This is much more convenient than keeping everything in tabs in the browser. Do not ignore my request, please! I would really like this mechanics in the browser

Is there a setting I may change to allow the tab icons / text to fully display down into the blank space that shows on my tab bar? I will attach an image. Thank you.

I'm not sure what version it changed, but I am now on 157.0 and on vertical tabs the container tab color indicator used to be on the side and now it extends the length of the tab horizontally which I find extremely off-putting.

Is there a way to revert this change? Can it be modified with a theme perhaps?

Any help would be appreciated!

in the new nova settings ui the selected category is highlighted in light purple. not a fan. how do i change it. don't mind collateral damage as I'm not of fan of this color

Καλησπέρα σας. Σε hp all in one cr005 καθαρό από cookies Mozilla μου εμφανίζεται πρόβλημα φόρτωσης σελίδας και αστοχία στο scorm quiz του ekek Athena για την προετοιμασία του ΑΣΕΠ.

For a few days I'm having trouble with Asana mails (notification mails informing me about replies, comments, etc).

Clicking on the mail to view it freezes Thunderbird for a good 5 seconds while one CPU core spins at 100%. This only happens with Asana mails (or at least I haven't found any other problematic senders).

I guess it's a problem with validation or parsing of the mail's HTML content. But I don't know how to debug this.

I can't pinpoint exactly when it started happening, but it was around the time I've switched to the [new snap release track](https://support.mozilla.org/en-US/kb/channel-choices-thunderbird-snap-and-flatpak#w_snap-channel-changes-in-2026). But since this happens with Snap and Flatpak I think the culprit may be the 153.0 update.

Things I've tried:

• Clearing cache and msf files.
• Troubleshooting mode with add-ons disabled.
• Reinstallation. Creating new profile + importing old data.
• Switching from Snap to Flatpak
• Switching Message Body display to Plan Text or Simple HTML.
• Disabling HW acceleration.
• Checking console for suspicious output.

Anything I can do to create handle the problem or collect information for a proper bug report?

I start FF in safe-mode. I open a local page which includes only one URL. When I hover on this link I see (`tcpdump`) a DNS lookup being performed for this domain. I followed the suggestions from Mozilla but I still see this.

How do I stop this access.

I use FF "156.0 (64-bit)" on Fedora 44.

TIA