I am moderator on a site with lots of structured content and regularly edit posts for poor formatting (in particular Markdown and LaTeX). Many of those tasks are tedious and could easily be performed by a search & replace function which, sadly, my browser of choice Firefox lacks.
I could not find a suitable plugin (although I admittedly did not check all >900 results) which is surprising; this seems to easy and useful a feature to not have a plugin!
Copying posts into a text editor is a nice workaround in some cases, but not in all. Some text editors don't have search ^ replace (e.g.
gedit, default editor for many GTK based Linux distributions), and I might not be able to install one on every machine I use SE on (university, friends, ...).
Is there a way to bring search & replace to Firefox, preferably with regexp support?
My OS is GNU/Linux, more specifically Ubuntu.