Rated 5 out of 5 stars
Nuvola slows TB down greatly when opening an mail here, by several seconds. I am using TB 3.0.3, with all extensions disabled, except for the Nuvola theme. I don't know if the problem exists only with the latest TB, or if this is a combined problem. If I disable Nuvola, mail opens in 1 second. With all extensions enabled, and Nuvola disabled, again, mail opens in 1 second. Note that this does not affect TB startup time in any way.This review is for a previous version of the add-on (1.8).