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Firefox Adds Masking to Better Help With Email Spam and Tracking
(www.lifewire.com)
A place to discuss the news and latest developments on the open-source browser Firefox
It has both a free and a Premium plan. The free plan gives you five email masks; Premium (€1 a month) gives you unlimited masks, and indeed email replies and the ability to block promotional emails.
No thanks, new kid in town https://skiff.com already provides that feature