update faq to match settings
opening this as a reminder to myself now that I'm done with the settings. tho if someone wants to take over this go ahead:
- https://librewolf.net/docs/faq/#how-do-i-enable-extensions-auto-updating -> settings#116 (closed) -> update faq entry now that it's default, keep warning that only people who review code should change this.
- https://librewolf.net/docs/faq/#how-do-i-disable-bookmarks-opening-in-a-new-tab -> settings#124 (closed) -> I would say just remove it, but it's also ok if we want to keep it and update it.
- https://librewolf.net/docs/faq/#how-do-i-change-language-in-the-browser -> settings#125 (closed) -> basically now users can do what they want with their preferred language and it will still be spoofed to en-US. I don't know what to do with the faq entry, maybe warn users that websites will se them as en-US for their privacy?
there's also other points of the docs that need to be updated but I'd rather take care of those separately as they are a bit more delicate. also worth noting that we have a !17 (merged) that covers some of my points but it has other changes that have yet to be reviewed (I think at least).