> I just tried to setup the j2se5.0 plugin in Firefox and now firefox > refuses to open. Has anyone else had this problem? Not quite a direct answer, as I ended up using 1.4.2 from Blackdown's site (for 64-bit Java), but maybe there's something that'll help you with a 1.5 install. Here's a link to the article I more-or-less followed: http://www.fedoraforum.org/forum/archive/index.php/t-29204.html I do remember reading that it is important to use a soft-link to the plugin .so instead of actually copying it to the firefox/mozilla plugins directory, as the latter would prevent Firefox from starting.