No Focus Spying
Prevent sites from being able to determine whether it is visible or not.
No Focus Spying - Prevent sites from detecting tab/window focus
No Focus Spying is a Firefox add-on that prevents sites such as Canvas from being able to detect whether the tab/window is focused or not.
Add-on stats
Weekly download count: NaN
Firefox on Android: No
Risk impact: Moderate risk impact 
Risk likelihood:
Manifest version: 2
Size: 10.99K
Ranking
Other platforms
Not available on Chrome
Not available on Android
Not available on Edge
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Add-on summary
Prevent sites such as Canvas from being able to tell if the tab/window is focused or not.
User reviews
by Firefox user 13450032, 2021-12-02
by ll413, 2021-03-22
funciona a medias, evita el focus obligatorio de algunas partes de una pagina, pero hay en otras partes que no funciona, en "faucetcrypto" no funciona al mirar "Ptc Ads"
by aleex5, 2020-08-08
Add-on safety
Risk impact
No Focus Spying requires a few sensitive permissions. Exercise caution before installing.
Risk likelihood
No Focus Spying has earned a fairly good reputation and likely can be trusted.
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