Rated 4 out of 5 stars

Nice Addon, could work a bit more accurate when detecting loading of the program window.
Indeed Seamonkey2.0 compatibility is missing in the install.rdf file.

@bztsilversleeves: You just need to add



{92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}
2.0
2.0.*



to the install.rdf file
- or -
set extensions.checkCompatibility to false in about:config