Hi there,

You're currently posting in the English forum and we can't guarantee that a community member who speaks Russian will be able to assist you here.

In the meantime, you might want to check out the Get community support article, which may be available in your language.

That said, it looks like your case may relate to this bug. I'll make sure share your about:support info with our team so they can investigate further.

Hi there,

It's totally ok if you're not comfortable sharing the about:support information. I just wanted to provide an update here.

Recently, we added the following line in the 142 release notes under the Unresolved section:

Multiselecting non-contiguous tabs to drag may result in toolbar unresponsiveness or visual glitches. Dragging any single tab should resolve this. We will be landing a fix in the next dot release with Bug 1984342.

The dot release is planned this week, so please keep an eye on our update soon and hopefully you can let us know if it fix the issue.

No didn't help firefox 143.0 linux red os arm

Didn't help firefox 143.0.1 linux red os arm

Didn't help firefox 143.0.3 linux red os 8 arm kde plasma

I don't have a problem with that on 143.0.4. Can you try in troubleshooting mode?