First, Does Mozilla Firefox install without the extentions?
If it does, you a step in the right direction.
Second, Are you trying to install the google toolbar extention? If you are, then this is where your problem is. This extention will not work for Windows 95/98/ME that I know of. There may be more systems but this is what I know for now.
Third, install each extention one by one and try it for a little while to see if the problem comes back.
Some popular extentions are mentioned here
Hope this helps.
I have windows 98SE and have been having probs with Firefox 18.104.22.168, especially with extensions not installing. I tried creating a new profile, but still could not intall extensions. I decided to do a "clean" install, by uninstalling, deleting the firefox profile folder, etc.
I tried reinstalling, which worked up until "launching", a pop up window says firefox is already running to close the application, or restart the computer. I did the CTRL+ALT+DEL, and firefox was not running, so I did restart the computer; tried to start firefox in safe mode, the same pop-up came up again. I uninstalled and reinstalled at least 3 times since then, cleaning out my temp folder beforehand, as suggested in firefox help forums.
Hope someone can help here. I'm using Opera now. So glad I installed it a couple of weeks ago, since I was having probs with firefox's extensions.
Thanks in Advance,