Bluesky Slow Blocker by Brokenpla.net

Bulk-block/mute accounts from Bluesky feeds, profile followers, or thread replies — with a review queue and a pace you control.
Bluesky's built-in blocking is one account at a time, which doesn't scale when you're dealing with coordinated spam networks, bot swarms, or a wave of harassment in a single thread. This extension collects candidates from four sources:

Feeds — import every account posting in a given feed (useful for algorithmic feeds that surface a particular kind of unwanted content)
Followers — block everyone following a specific profile (e.g. a spam or bot account's follower base)
Threads — block everyone who replied to a specific post (useful after a pile-on or brigading incident)
Imported files — Import and export (backup-)list as you see fit

Nothing gets blocked automatically until you want it. Every collected account lands in a review queue first, so you can remove false positives before anything happens. An exclude list (with one-click sync from your own follows) keeps people you actually want to see out of the queue entirely, and a configurable pace (1–50 blocks/minute) spreads the actual blocking out instead of firing it all at once.
Regrets? Unblock/unmute is just as easy.

Feed creators are automatically excluded from their own feed's collection, so importing a feed can't accidentally block the person curating it.

Drawbacks:
-Intended to enable the extension only for usage, as it has an in-window control on almost every page. Disable the extension when done to make it go away. I didn't ask Claude to make it beautiful, but it has a dark theme.
-Due to the fact that this is also using the bluesky API, you need to set a special "app" password in the bluesky settings.

Also this is my first vibecode and first extension, congrats to me.

Open source. Not affiliated with Bluesky Social PBC — an independent tool built on the public AT Protocol API.