Please provide all info that you can like version of firefox by using apt-cache policy firefox-3.0 and if you are on 64bit or 32 bit trying the flag that Alexander mentions above and any log files you can get to capture any errors or warnings most of time you can do this by running a backtrace since firefox-3 doesnt output any errors to terminal
Please provide all info that you can like version of firefox by using apt-cache policy firefox-3.0 and if you are on 64bit or 32 bit trying the flag that Alexander mentions above and any log files you can get to capture any errors or warnings most of time you can do this by running a backtrace since firefox-3 doesnt output any errors to terminal