From the firefox search engine page (https://addons.mozilla.org/en-US/firefox/search/?atype=4), I get the following error alert message when I click "+ Add to firefox":

Sorry, you need a Mozilla-based browser (such as Firefox) to install a search plugin.

I've found 2 temporary solutions so far that work fine, but they're workarounds and not exactly an answer to as why this is happening:

Temp solution #1 is to right-click on the "+ Add to firefox" link, and "save link as" the xml file to /usr/lib/firefox-addons/searchplugins and restart firefox.

Temp solution #2 use firefox in safe-mode by running firefox -safe-mode in a terminal.


Th add-on responsible seems to be : Unity Desktop Integration 3.0.2, desactivating it for me resolves the issue.

Since I'm using Ubuntu, I wonder what the desactvation of this plugin will cause however.


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