Остаётся на заднем плане и следит за изменениями на веб-страницах.
With the free Pagemonitor Pro you can monitor any website content changes, like price monitor on shops or any other element on websites.
Page Monitor Pro is an open source fork of the original open source Page Monitor, which is now available under MIT License. We removed any tracking code and bloat by visualping and keep this extension maintained and under development. Page Monitor Pro is a free monitoring and website change detector to send you website change alerts.
OPEN SOURCE (https://opensource.org/licenses/MIT)
New features and design is currently in progress.
Extensions: Distill / Sitedelta Web Content Monitor and Refresh Monkey and Wachete + Update Scanner for Firefox.
Software: Versionista, ChangeDetection, Alertbox and OnWebChange