Have you tried the standard troubleshooting tips? https://support.mozilla.org/en-US/kb/firefox-support-troubleshooting-guide http://kb.mozillazine.org/Standard_diagnostic_-_Firefox

It hard to generalise about memory usage. it is probably not too unusual for Firefox to use over 1GB of RAM. However right now I have 4 windows open and dozens of tabs yet am still under 1GB . The machine I am on right now has memory issues and is rather temperamental, its only got one 2GB RAM chip at present so I would soon notice if Firefox started gobbling memory. You do not seem to have even posted from Firefox so presumably you are finding it unuseable. * See [[Firefox uses too much memory (RAM) - How to fix]] * [[Firefox is slow - How to make it faster]] Instead of the Refresh (That will remove your Firefox extensions) try creating a new additional profile, then run in Firefox's safemode with all plugins disabled. Does that help ? * [[Use the Profile Manager to create and remove Firefox profiles]] * You may wish to avoid [[Refresh Firefox - reset add-ons and settings]] for now. *But (temporarily) make plugins never activate[[Disable or remove Add-ons]] * And test using [[Troubleshoot Firefox issues using Safe Mode]] Please post back to say what you tried and how you get on.