steamgift plus addon, firefox hangs

Well maybe some addon or plugin hangs firefox try...

1. Update addons and plugins. [include greasemonkey]
2. Launch firefox in safe mode how to
3. If the safe mode work and not freezing, the problem is some addon or plugin and you have to find wich one by deactivate one by one and test.
4. If not work Safe mode, try a fresh installation of firefox and only SG PLUS nothing more and check.
5. Rarely hangs out - too many tabs opened or you ran out of memory [RAM].

Hope you fix the problem.