Yeah, !important
doesn’t affect inheritance in any way. It only means that this particular rule is to be used if there are multiple rules that would set that particular property for the element in question (unless there’s some other more specific rule with !important tag as well). MDN lists property inheritance in the formal definition section. You can totally make background-color inherited though - like *{ background-color: inherit }
(and then set the property to something else on the root element from which you would want to inherit from) but it would then either not apply if website set it to anything else for an element or override any other set value if you used !important
tag.
One other thing worth noting is that I would not recommend the rules mentioned for userChrome.css to be used as is - at least on Windows they completely break Firefox startup - it fails to display any window if you do that. Instead you should add a [
selector to wait a bit before those rules are applied to main-window: ]
#main-window[sessionrestored], #tabbrowser-tabpanels{ background: transparent !important; }
I’m guessing that the reason (and a good one at that) is that simply having an option to connect to a local chatbot leads to just confused users because they also need the actual chatbot running on their system. If you can set up that, then you can certainly toggle a simple switch in about:config to show the option.