Yes, quite safe. my friend made it out of necessity.
Fully secure: Chrome's built-in browser extension security is very powerful and ensures that extensions are limited in the amount of damage that can be done to your data and browsing experience through malicious third party vectors. We have ensured this is further locked down by disallowing any external connection to Tabr, and also restricting Tabr to only loading it's own resources (with the exception of site favicons).
Get more info from the
description or ask questions on
reddit/r/tabr