I'm running the Ubuntu snap version of Firefox and recently I've had a problem where the more files I download the more sluggish downloads become. When I download a file now, even a few KB, Firefox becomes unresponsive for a few seconds, including video in other windows freezing. For longer downloads, Firefox is unresponsive the entire time. During downloads Firefox uses 1 core 100% in htop and about:performance shows "Firefox" using 100%

Clearing all data in settings doesn't help

Clearing the list of downloaded files doesn't help.

Deleting the profile fixes it, but the problem comes back as I download files.

I have a policies.json file that sets some privacy related settings and installs 3 addons ([email protected], [email protected], @testpilot-containers).

I also have a hosts file that blocks all mozilla domains (except addons.mozilla.org)

I have a fast CPU, tons of ram and a nvme drive.

I'm not really sure how to debug this?

I deliberately set keywords.enabled to false so that misspelled urls don't end up at google, but now I just noticed that it's enabled again.

Is this a setting that gets reset over updates?

Can any devs comment?

Okay, Wayland is the future, blah blah.

Would it be possible/make sense to make a Wayland compositor that would emulate a X11 server so a X11 WM could talk to it and be used to manage windows?

I'm just thinking about how we could make sure that the tons of obscure but cool WMs survive the waypocalypse.

I can't seem to access https://www.presstv.ir/ or https://www.rt.com/

Are these banned in the UK?

Is there a list of sites banned in the UK (whether by ofcom or any other agency or company)?

I couldn't find any news stories or discussions about this. How does the UK banning people from being able to access foreign news sites apparently just fly under the radar?

What is the technology used?

Thanks.