Not sure this would affect anyone, but i forgot to update the Firefox version listed in my user-overrides.js from 70 to 71 the last time i updated the file. Anyway, i did that. Just now actually. Do you care? I didn't think so :)
On the Firefox-only side, there's a link to the CustomCSSforFx project which is an excellent way to change the appearance of many of Firefox's widgets and pages. There's also some troubleshooting information and more.
I updated Firefox Extensions – My Picks to include information regarding the dreaded CSP header modification issue that Mozilla has so far not addressed and which can result in compromising ones privacy and possibly worse.
I updated my user-overrides.js file for Firefox. Grab the update here. Note that i'm no longer listing changes within the file, however you can always compare versions here. Differences between 70r3 and 70r4 are here.
Remember to run the 'ghacks' prefsCleaner script after updating.
If you're lost, see one of my Firefox guides.