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cannot save open tabs when closing, instructions on "help", don't; FF4 has crashed/locked several times also. Frequently have to hit link button (or back button) twice for it to work. Had MUCH better performance from previous version (Windows 7 user)

previous version asked if I wanted to save tabs when closing, not version 4. "Help" suggested checking setting but does NOT indicate what to check! (I cannot find any options/settings related to saving tabs upon closing). Second option was to rename two files, did so, did not allow saving tabs (just erased history). I liked saving tabs and am very frustrated by this.

FF has crashed a couple of times, locked a couple of times (most recently I could not even stop with windows task manager, had to reboot)

Frequently links (or "back" button) gives no response until pressed twice

previous version asked if I wanted to save tabs when closing, not version 4. "Help" suggested checking setting but does NOT indicate what to check! (I cannot find any options/settings related to saving tabs upon closing). Second option was to rename two files, did so, did not allow saving tabs (just erased history). I liked saving tabs and am very frustrated by this. FF has crashed a couple of times, locked a couple of times (most recently I could not even stop with windows task manager, had to reboot) Frequently links (or "back" button) gives no response until pressed twice

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forgot to add that pages are generally much SLOWER to load with version 4 than previous version. NOT progress!