User robinmetral on Discourse shared the following suggestion:

At the moment Firefox for Android only supports installing add-ons directly from addons.mozilla.org; attempting to install an add-on from another site will end up downloading the XPI file.

Is this documented anywhere? It would be very useful as an aside on Extension Workshop’s Self distribution page, for example. The current version of the page makes it seem like the only “downsides” to self distribution are lack of visibility and the need to publish an update manifest manually. No out-of-the-box availability on Android is kind of a big deal.

Request: Update the Self Distribution to note that on Android following a link to an .xpi file will download the file rather than install it as on Desktop.