Mature... as in age or content? 😁

👍

This detailed browser review may help: privacytests.org

As a Firefox and Thunderbird user from day one, I recently jumped ship to LibreWolf and Betterbird when Mozilla's TOS changed substantially 😲

Search "Keyboard" from ur Applications Menu, got to "Application Shortcuts" tab. Is that what ur looking for? U can add or customize keyboard shortcuts here...

Same here, have had Xubuntu installed on 3 different Dell Vostros over last 15 years or so. Never had any driver issues... 👍

Impressive but not record-breaking... but this might be:

Seven thousand five hundred tabs open in Firefox, a new world record?

disassociated.combs-firefox-new-world-record

A couple of years back when we all had too much time on our hands, i discovered that I had accumulated a total of 6453 open tabs in Firefox in the previous 3 years 😂
FF performance never suffered, xubuntu never complained!

I've had LineageOS of some sort on my Galaxy phones since my Galaxy S 😁

You might want to start thinking your way through virtualizing, so you have a plan B when the Gateway gets tired...

U tried notepadqq?

Suggest u try Boot Repair Disk
Here's an overview before u dive in: help.ubuntu.com/community/Bo...

Home: sourceforge.net/p/boot-repai...

Saved my @$$ a couple of times 😁