Keep selected tabs responsive with auto‑recovery when pages freeze or stall. All local, no account, no tracking.
- Auto-recovery for frozen tabs
- All local, no account needed
- Zero tracking
Calmcore Extensions
Small browser tools to keep your tabs and bookmarks under control.
A home for all browser extensions
developed under the Calmcore brand.
Extensions
Overlay bookmark folder labels on links when URLs match your bookmarks.
- Visualize folder structure instantly
- No data leaves your browser
- Clean, unobtrusive labels
Why Calmcore?
Design principles for our browser extensions
Local‑first by design
We keep processing inside your browser whenever possible and avoid sending data to our servers unless it’s clearly needed.
No account by default
You can start using our tools immediately, without sign‑ups or logins. If any future product requires an account, we’ll make that clear up front.
Privacy‑focused
We don’t use third‑party analytics, and any usage data we collect is kept to the minimum needed for stability.
About Calmcore
Calmcore is an independent development brand focused on "calm" browser tools. We build small, focused utilities that respect your privacy and help you maintain control over your digital environment.
No direct sales are made on this domain. If we accept payments in the future, they will be processed by LemonSqueezy.
Contact & Support
For questions, bug reports, and feature requests for any Calmcore extension, please use the form below.
Brand: CalmcoreRegion: Japan
Email: support [at] calmcore [dot] app
Legal & Policies
These policies apply to all browser extensions listed on this site.