Firefox Tweaks: Task Manager, Suppressing the Download Pop-Up, Compact Windows

How did I not know that Firefox has a task manager (about:performance (update: and about:processes)) where you can determine what tabs (and add-ons) are using significant resources? (If you’re not using Firefox, well, you should be.)

In a related development, newer Firefox versions have started popping up the download list whenever you download something. I find it annoying, frankly:

Luckily, it’s easy to turn that feature off. Enter about:config in the location bar, and then toggle browser.download.alwaysOpenPanel to false:

Firefox in later versions seems to take up more screen real estate. A couple of tweaks reduce that:

about:config → browser.compactmode.show = true

and, ☰ menu → More Tools → Customize toolbar ...

In the menus at the bottom of that window, disable the bookmarks toolbar and set the density to compact:

It’s still not quite as sleek as it could be, but it’s better...