Before I upgraded my laptop’s hard drive to SSD, I couldn’t keep a lot of tabs open on Firefox because it takes up huge amount of memory and slows down my laptop to a crawl. So what I normally do is note down the interesting sites on a text file and will visit them again when I have the time. Now with SSD drive, everything became so fast and I no longer need to close the tabs. Every time I exit Firefox 3, I simply click on the Save and Quit button when I am prompted “Do you want Firefox to save your tabs for the next time it starts?” The next time I launch Firefox 3, all tabs are automatically opened.
Firefox 4 final has just been released and in fact I downloaded and installed it a day earlier because the setup installer is already on Mozilla’s server. Updating from Firefox 3 to Firefox 4 is very easy. All you need to do is run the Firefox 4 installation file (Firefox Setup 4.0.exe) and it will automatically upgrade as there is no need to uninstall Firefox 3 first. After upgrading, I immediately noticed that Firefox 4 no longer prompts to save the tabs on exit and it only warns me “You are about to close X tabs. Are you sure you want to continue?” There is only a checkbox to warn me when I attempt to close multiple tabs.
Fortunately the saving of tabs on quitting Firefox 4 hasn’t been removed and it has been disabled by default. There is no need to use add-on or extension for this feature. Not sure why the Firefox developers decided on this but here is how to enable saving of tabs when closing Firefox.
1. Type about:config at the address bar and hit enter.
2. Click the “I’ll be careful, I promise!” button
3. At the filter bar, type browser.showQuitWarning and hit enter.
4. You can either double click on it to change the value from false to true, or right click on it and select Toggle.
This change takes effect immediately without restarting Firefox. Now try closing Firefox 4 with multiple tabs opened and you’ll be prompted to save the tabs.