When you submit the search, there is a message below the Show All button which states that the breach data is provided by Have I Been Pwned. So it shouldn't differ at all really. Hopefully this is just the first steps by Mozilla towards creating this kind of service.
More services like this can't be a bad thing. If haveibeenpwned disappeared tomorrow, we'd have no replacement
Re:Firefox Monitor
by garaboncias2 on Thursday April 04, 2019 @02:30PM
(#19575590)
"Breach data provided by
Have I Been Pwned"
Re:Firefox Monitor
by garaboncias2 on Thursday April 04, 2019 @02:33PM
(#19575630)
but it is a good service, that it alert me when i want to navigate a site, where data breach happened.
https://haveibeenpwned.com/
Both offer email alerts but Firefox Monitor said my old email was found in 11 data breaches while haveibeenpwned said 14.