Hi, possible. Suggest Monitor CPU usage in MS Task Manager and Ram usage, yes will see multiples of Firefox is normal. But how many megs are total ? Though can not remember how well it does that in 7. But you should be checking out is Event Viewer and see if remember what time it crashed. Check that time and see what the red was for. Or crash it by doing what you are doing. Remember time and then check. Each crash sends a event log but is not that worthy to check as difficult to read and find what to open the log with. Suggest use search for CMD.exe and Right Click and Run as Administrator then copy/Paste sfc/ scannow into it and enter to fix registry errors and replace files it's storage for bad ones in system. ( sfc/<space>scannow ) '''''To be Checked and turned off unless needed for accessibility : ''''' Please : go to the Firefox 3 Bar Menu --> Options --> Privacy & Security panel and under Permissions check (put a tick in the box) the setting to Prevent Accessibility Services from accessing your browser. '''''Multi-Processor Support : ''''' Go to the 3 Bar Menu then Options --> General --> Performance and untick everything. change the recommended size lower then see how it runs. Note: 1 = No Multiprocessor = slow again. Try 2 Restart Firefox after making these changes please. Note : Hardware Acceleration is for Video Card, Monitor to see if remain off or to turn back on. Only Disable as last resort. '''''Multi-processor Can completely disable it this way in about:config :''''' dom.ipc.processCount set to 1 browser.tabs.remote.autostart = false browser.tabs.remote.autostart.2 = false *http://kb.mozillazine.org/About:config Only move to esr if low ram and old system. '''''Firefox Extended Release Version :''''' Firefox ESR does not come with the latest features but it has the latest security and stability fixes. *https://support.mozilla.org/en-US/kb/switch-to-firefox-extended-support-release-esr If do please : *https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles *https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer Please let us know if this solved your issue or if need further assistance.