I opened Firefox 134.0.2 (64-bit) that I installed via Flatpak—got the same slow pop-up issues.

Thanks but I want to stick with the ESR version. It’s nice n’ stable.

This is apparently the latest version of Firefox ESR that’s available in Debian’s repository.

I used these commands to update Debian:

sudo apt update -y && sudo apt upgrade -y && sudo apt autoremove

Here’s the output:

Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Making those changes didn’t resolve the problem

Tell me about it, it took me a long time to get out of google’s ecosystem. As cliche as it sounds, you have to do it one step at a time

I’m happy that syncing works for you but privacy is very important to me so I don’t want to upload my data to someone else’s server(s).

I’m going to experiment with uninstalling flatpak firefox completely and reinstalling it to see if it’ll fix the issue.

If that doesn’t work, I’ll try using firefox downloaded & installed with apt.

Thank you, this resolved my issue.

I read the wiki and changed “Hardware-accelerated decoding” to “VA-API video decoder”.

My original problem was caused by the fact that this was set to automatic, now that it’s set to “VA-API video decoder” VLC is able to play mp4 files again without any issues.

I disabled hardware acceleration and VLC is able to play mp4 files again; however, is there a way to turn on hardware acceleration without getting these errors?

Update:

Changing “Hardware-accelerated decoding” to “VA-API video decoder” fixed the issue. Now VLC is able to play mp4 files with hardware acceleration without any issues.

Tried it. I don’t think there’s anything to upgrade:

Jean-Luc@Enterprise:~$ sudo apt dist-upgrade
[sudo] password for Jean-Luc: 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

How do I do that?