Extensions by Leadomator

Gmail Filter by Sender & Subject + Mark as Read

⚡ Productivity

Select emails in Gmail, edit the subject, and create a mark-as-read filter for that sender, or for the sender only.

Block Sender for Gmail

⚡ Productivity

Adds a Block button beside Report spam in Gmail, for selected emails and open emails.

Gmail Sender Guard

⚡ Productivity

Warns you when you're about to send from the wrong address in Gmail, based on the reply or your history with the recipient.