Option to disable actual look of font Rated 5 out of 5 stars

A great extension, but I have a problem with loading time, when i compose a new message.

I have a large number of fonts installed on my system, and it takes more than 10 seconds until the compose window is completely open.

Could you add the option to disable the actual look of fonts?

This review is for a previous version of the add-on (0.7.8). 

Send me email arivald@interia.pl, if You wanna test new beta version, with some fixes regarding performance.

Basically I try to move as much work as I can into background, including code to setup font faces. It could help or not, it must be tested in real environment.

If this not help I will consider adding new option.