Offline when Minimized
Blocks all connections when the browser window is minimized. The connection request is blocked if it's in a tab where its parent window is minimized.
Offline when Minimized - Firefox Add-on
Offline when Minimized is a Firefox add-on that blocks all connections when the browser window is minimized. It prevents tabs in a minimized window from transferring any data over the net, saving computer resources and providing peace of mind.
Add-on stats
Weekly download count: 1
Firefox on Android: No
Risk impact: High risk impact 
Risk likelihood:
Manifest version: 2
Permissions:
- *://*/*
- webRequest
- webRequestBlocking
Size: 8.58K
Ranking
Other platforms
Not available on Chrome
Not available on Android
Not available on Edge
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Add-on summary
Get the peace of mind that your open pages/tabs are not accessing the internet while their window is minimized. This saves some of the computer resources. Firefox automatically reduces the javascript timer frequency when the tab is in the background, but does not prevent it from accessing the network. With this add-on you get the added benefit that a tab in a minimized window is unable to transfer any data over the net.
Notes:
- This add-on does not terminate connections that are already established when the window is minimized. It just prevents new ones.
- For a more radical solution, try the add-on "Auto Tab Discard" by Richard Neomy, which totally pauses the processing in background tabs.
User reviews
by A FF User, 2020-09-12
Holy shut! It works! Easy to check: go to YouTube, click a random video that you haven't seen before (aka. not in cache) and immediately minimize Firefox. YouTube has no time to preload, and never runs the video (you wont hear the audio).
@matroshka : Could you please make an option to minimize to tray (or/and very least to bar) when the [X] Exit icon is clicked on Firefox? Thank you!
by Marco Antonio, 2020-05-10
Add-on safety
Risk impact
Offline when Minimized requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk likelihood
Offline when Minimized has earned a fairly good reputation and likely can be trusted.
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