P83 by Peter Stuifzand

P83

The new version of Firefox has a nice dark theme.

Responsive Viewer – Get this Extension for 🦊 Firefox (en-US) — Extension with which you can see multiple responsive views of the same page at the same time.

VisBug – Get this Extension for 🦊 Firefox (en-US) — Extra visual tools for Firefox

The address bar at the bottom of the screen is a nice feature in Firefox for Android. It's the place where my thumbs already are.

Debugging variables with watchpoints — This allows you to break on get and set in properties.

Markdown clipper — Firefox extension to clip pages as Markdown

The 'Search Google for' context menu is opening search results in a foreground tab, instead of a background tab. —