Extensions
July 24th, 2026
After sixteen months of work, Horse 3.3 beta ships preliminary extension support. Three extensions run today: 1Password, uBlock Origin Lite, and Dark Reader.
What Runs Today
1Password
The password manager a lot of people have kept a decade of logins in. It fills, saves, and unlocks in Horse the way it does everywhere else.
uBlock Origin Lite
The careful, low-overhead build of the best-known blocker on the web, rewritten for Manifest v3. It brings its own filter lists with it.
Dark Reader
The one that made bright websites survivable at midnight, with the per-site controls and scheduling that keep a page readable rather than merely dark.
Horse used to ship its own ad blocker and its own dark reader, because it could not run the real ones. From 3.3 those are retired and these do the job instead. Maintaining a second-best copy of someone else’s good work was only ever the workaround.
Saddlepack, the built-in password manager, stays. It keeps passwords on your machine with no cloud and no tier above it, which is a different offer from 1Password rather than a worse one. Use whichever suits you.
How To Get Them
- Turn on the Beta channel in Settings.
- Relaunch Horse. It comes back on 3.3 beta.
- Click the extensions icon and install the ones that are available.
There is no Chrome Web Store support, so those three are what there is to install. Anything else has to be tested here by hand first, because extensions were built for browsers made of tabs and Horse is made of Trails.
Thank You
None of this was built in here. Electron could not host Chrome extensions at all, so the work had to happen upstream, and it did.
Thank you to everyone who backed the Help Extend Horse campaign. You made it the most upvoted pull request in Electron’s history, and that is what got the core team’s attention.
Thank you to Pieter Levels for lending his support when it counted.
Thank you to Sam Maddock, who wrote that pull request and who maintains the packages extension support runs on today. Every Electron app gets this, not just Horse. If you use any of them, please consider sponsoring Sam on GitHub.
The whole sixteen months, and the timeline of what landed when, is kept at Help Extend Horse.


