JRF is a browser extension publisher, most of their extensions are accessibility extension and productivity extension.
November 2nd, 2020
Interrupts web-navigation to specified urls in order to Protect Privacy.
June 1st, 2020
Post data in '#tweet-sig-in' or selection and put the posted url into '#tweet-sig-out' or clipboard.
An ingredient of Privacy-Protected logins or payments.
You could send emails to publisher, or check publisher's website.