One change in Firefox 4 is to by default stop Firefox displaying the warning message, but it can be turned back on by changing some preferences.

1. Type about:config into the location bar and press enter
2. Accept the warning message that appears, you will be taken to a list of preferences
3. Locate the preference browser.tabs.warnOnClose, if its value is set to false, double-click on it to change its value to true
4. Repeat this for these 3 preferences browser.warnOnQuit, browser.warnOnRestart and browser.showQuitWarning

On the "Firefox does not ask to save tabs and windows on exit" reply "browser:config" is not working either!!!

Also from email each link start a new firefox page....

Thanks for your help TonyE! My problem has solved!

I'm still observing if there are more bugs...

Thank you!!!

arzu, to follow the instructions TonyE gave you must put the "about:config" in the address bar of your browser.

About your email link problem try going to your menu toolbar, and clicking: "Tools>Options>Tabs" and tick the box for "Open new windows in a new tab instead" That should handle that.

If this works, it is very useful. Here goes nothing.

Tried TonyE's solution and all those settings were already there.

Firefox 4 saves the previous session automatically.
You can use "Firefox > History > Restore Previous Session" to get the previous session.
There is also a "Restore Previous Session" button on the default about:home Home page.

Another possibility is to use:

• Tools > Options > General > Startup: "When Firefox Starts": "Show my windows and tabs from last time"