Rated 5 out of 5 stars

Tested it with some userscripts, even wrote one myself. Works well and as advertised.

Made a benchmark and this addon adds only 1 MB to memory consumption and 5% to Firefox start-up time. I didn’t observe any other slow down during use, however. So it seems to be well-done.

Thank you for a useful addon!

This review is for a previous version of the add-on (