(feat): Support for Trisquel/ABrowser

Summary

I assume the Minds page layout isn't rendering properly in my browser, as it looks really weird, and as a result the UI is really hard to navigate and use. If you look at the attached screenshot, you'll see I'm trying to post a comment, but the 'send' button has disappeared into the void.

Steps to reproduce

Install the GNU/Linux I'm using in a VM, open the default browser, navigate to Minds.com, login.

Platform information

• Device: Acer Aspire One netbook, 32-bit (full specs here: https://www.coactivate.org/projects/disintermedia/bishop)
• OS: Trisquel GNU/Linux 8 (Flidas)
• Browser: ABrowser 66.02 (default browser, basically Firefox without all the proprietary bits and with all the privacy and anti-tracker protection hardened).
• Add-ons:

• standard ABrowser variations from vanilla Firefox
• NoScript 10.6rc1 (minds.com set to "trusted)
• uBlock Origin 1.18.14 (turned off for minds.com)