for firefox and js, I always used http://en.wikipedia.org/wiki/Greasemonkey
for custom css... I clearly remember that old firefox version could let me set custom css, no plugin needed...
for custom css... I clearly remember that old firefox version could let me set custom css, no plugin needed...
[1] http://www-archive.mozilla.org/unix/customizing.html [2] http://code.google.com/p/chromium/issues/detail?id=2393 [3] http://windows.microsoft.com/en-US/windows7/Use-your-own-sty... [4] http://www.opera.com/docs/usercss/#user-mode