I'm trying to get the "It's all text" add-on to work with Zimbra Desktop: https://addons.mozilla.org/en-US/firefox/addon/4125
The first problem was that the extension was not recognised since Zimbra Desktop identifies itself as an embedded application and not as Firefox, and it was solved by adding this to install.rdf:
Now the preferences window appears in the Add-ons window, unfortunately the add-on itself still doesn't seem to be working. If I launch Zimbra Desktop in a regular browser window, then I can use the "It's all text" add-on as I would expect.
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Any ideas/suggestions/tricks on how to use regular Firefox add-ons in Zimbra Desktop?