You will get up 3 times faster startup speed, browsing history will become faster, and performing operations with cookies will be quicker than before.
Once installed, SpeedyFox automatically detects your Firefox’s default profile. If you have more than one profile, you can select the one you want to optimize from the drop-down menu. If you have portable version of Firefox, choose your profile path manually by selecting “Custom…” profile. All you have to do is hit the Speed Up Firefox button.
The optimization process can take anywhere from 5 minutes to an hour depending on how large your databases are. The whole optimization process is safe as it does not effect your history, bookmarks, passwords, etc.