How to fiddle with Firefox .jar files relatively easily
Firefox doesn't leave all of these files sitting around for you to
edit; it bundles them up in various
.jar files (pretty much all in
chrome/ subdirectory). Fortunately
.jar files are just ZIP
archives. The easy way to modify files in them is:
- unzip the relevant jarfile somewhere (I usually use
chrome/itself, but I live dangerously)
- edit the unpacked files to taste
- run '
zip -f .../<whatever>.jar' in the root of where you unpacked the jarfile to 'freshen' it with your changes
- restart Firefox to test things.
(There are recipes for running Firefox from unpacked versions of the
.jar files, but they require some black magic.)
(Figuring out which is the relevant jarfile (and the relevant source files) is beyond the scope of this entry; I suggest unpacking jarfiles and poking around. Also, see the Mozilla knowledge base at http://kb.mozillazine.org/.)
Comments on this page:Written on 22 November 2005.