About Startup is a Firefox, Thunderbird and SeaMonkey extension that displays startup timings as exposed by a Firefox API at the about:startup URL.
The three timings displayed are (in milliseconds from process startup):
- main: Firefox main function is entered
- sessionRestored: The tabs from the previous session have been created (not loaded)
- firstPaint: Something has been painted in Firefox (whatever this means)
No restart required!
- Fix for Thunderbird.
- Fix for Firefox >= 22 and Seamonkey >= 2.18.