How to add an item to firefox right-click menu to launch an exe on selected text?

"Can you do with the ""Send to"" extension? The developer says it's a test version and it has not been updated in a while (2004) so you will have to modify it to allow the more recent versions of Firefox.

Sends selected text to a file and then
opens that file in an external
application. You can use the
contextmenu or a shortcut (ctrl+e).



Edit: after modifying the ""em:maxVersion"" entry in the install.rdf file inside sendto.xpi, I could install it on Firefox 3.5 and it works nearly fine. The first time, it works OK, subsequent times, it does not. There is an error in the extension. I'll see if I can fix it (I've never done much Javascript and no Firefox add-on).

Re-Edit: I fixed it (roughly) but it works several times now. Get my updated version here."

"The add-on RunWith 0.3 does what you ask:

Runs the selected string as a command
line parameter of a local program via
right-click or Tools menu.

It dates from May 24, 2009 and supports Firefox 3.0 – 3.0.*.
It's recent enough and has very good reviews, so that if force-installed it might work for you."