Sindre Sorhus
It's a free upgrade for existing users.
It only supports modern Firefox and Zen profiles (not "about:profiles" ones). How to migrate: https://sindresorhus.com/velja#firefox-migrate-profiles
Shaun Harrison@sindresorhus This is soooo much faster than finicky, immediate buy
Thomas Beduneau@sindresorhus Custom rules was my number one missing feature. So glad it landed in v3. Thank you for the work! <3