It's not a complete port of this extension. For example, I haven't been able to adapt (I don't know why) the features which marks pages found in web search (for example).
I have simulated some features which are avalaible on right click on link or page, but not the complete Mozilla extension.
You can install it by using the setup (it's easier) or by using the zip file (KMESxxxxxxx.zip) you have then just to put the content of the miscelleanous folders in the correspondant folders.
What is not working ?
A+
Mozilla/5.0 (x11; U; Linux x86_64; fr-FR; rv:38.0) Gecko/20100101 Ubuntu/12.04 K-Meleon/76.0
Web:
http://jujuland.pagesperso-orange.fr/
Mail : alain [dot] aupeix [at] wanadoo [dot] fr
Ubuntu 12.04 - Gramps 3.4.9 - Harbour 3.2.0 - Hwgui 2.20-3 - K-Meleon 76.0 rc