Adding page title to the URL bar via userChrome.js
Back in the old days of classic extensions, they had access to FF's GUI elements, provided such privileges were asked in a manifest file.
For example, there were extensions that added tab's title to the URL bar. And I want to do exactly that nowadays, too.
WebExtensions can not do that but this should work with userChrome.js, right?
If so, maybe someone has already done it and I simply could not find it. Does anybody know?
If not, then how do I access the URL bar object to add text (e.g. page's title) to it or something else?
Thanks in advance.