Rated 4 out of 5 stars

Από τον/την adlercoa421 στις Ιούλ. 27, 2008 · μόνιμος σύνδεσμος

There is a newer version (v.0.3.4) on author website that works with FF 3.0.x:
http://mozmonkey.com/packages/copyplaintext/
I dont know why it isn't updated on AMO.