I have installed Firefox 3.5.3 (Shiretoko) from the Jaunty Repository, but it still crashes when I try to remote control a computer. The computer is not behind an http proxy. I had and still have the same crashing problem from Firefox 3.0.14 as well. I know that xulrunner was an incompatible plug in that showed up when I installed Firefox 3.5.3.
Does anyone know if this plugin is still in active development? It doesn't look like it's been updated for some time. The plugin works great once logged in to a machine but I do find it crashes FireFox quite frequently.
I have a 64-bit install of Debian, and I downloaded and installed the Firefox 3.6 from mozilla.com, and logmein works. I'm not sure how I did it, but you might try installing Firefox 3.6 from mozilla.com.