Running custom Javascript on every page in Mozilla Firefox
- by saturn
I have a custom piece of Javascript which I would like to run on every web page from specific domains, or perhaps simply on every web page.
(If you are wondering: it is not malicious. It allows to display formulas by using MathJax.)
Is that possible? I tried including it in userContent.css, that of course did not work.
A simple Greasemonkey script I tried did not insert it. Is it because of the security precautions? (Which would be very logical).
Still, there should be a way to do it on the machine I physically control, by changing something in Mozilla chrome directory, shouldn't it?
Anyway, how can I do this for myself?