When comparing Update Scannner for Firefox vs Distill Web Monitor, the Slant community recommends Distill Web Monitor for most people. In the question“What are the best webpage change detection and notification software tools?” Distill Web Monitor is ranked 2nd while Update Scannner for Firefox is ranked 5th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free
The add-on is free.
Pro Checking frequency between 5 minutes and a week can be set
Pro Highlights changes since last check
Pro Has advanced selectors of what to monitor
Pro Option to run locally on computer and in cloud
Can use browser extension to check for changes locally. There is also an option to check webpages in cloud. Changing run device is configurable from both browser extension and cloud.
Pro Has a free tier
Can monitor 25 webpages for free. It is sufficient for daily use.
Pro Can select with custom CSS/JS formulas
Pro Can select using async JavaScript
Pro Can watch pages behind logins and forms
Pro Can monitor PDF documents for changes
Cons
Con Expensive for casual use
Con Free tier is limited
Only 1 check per 6 hours could be done in cloud. However browser extension allows 5 seconds check interval for free.
Con Settings persistence behind paywall
Chrome can synchronize settings but that option is only for paying members of Distill.