Web pages scanner ਵਲੋਂ WaldiPL

Features:
- unlimited number of pages
- automatic and manual scanning
- ability to change charset, accuracy, interval between scans
- notifications about detected changes
- easily add pages to scan list
- preview old and new version of page
- sidebar (Firefox 54+)
and a lot more...

Known issues:
- some pages can not be added, when tracking protection is enabled