I checked the box that says "warn me when closing multiple tabs" but it doesn't warn me at all
I checked the box under Option > Tabs that says "Warn me when closing multiple tabs" but whenever I would accidentally close firefox with multiple tabs open, it doesn't warn me at all! It would just close everything. I have tried to check and uncheck it a lot of times but it still not working.
Opaite Mbohovái (1)
You can reset the warn prefs on the about:config page via the right-click context menu.
browser.tabs.warnOnClose , see http://kb.mozillazine.org/About%3Aconfig_entries browser.warnOnQuit , see http://kb.mozillazine.org/browser.warnOnQuit browser.warnOnRestart , see http://kb.mozillazine.org/browser.warnOnRestart
In Firefox 3 you do not get the 'Save & Quit' pop-up dialog if you choose Tools > Options > General > Startup: "When Firefox Starts": "Show my windows and tabs from last time".
If that option is selected then your pages will already be reopened the next time.
To get that pop-up dialog you have to select one of the other choices (Show my home page, Show a blank page).