Localhost Resource Permission API (Desktop/Android)

[Fuchsia]

Suggestion: Add Localhost resource to the Permission API

Reasoning: Some websites use port scanning to track users, similar to a "supercookie" (a feature or quirk that can be used to track users even when the history/cookies are cleared). The Brave browser has implemented this and Firefox could follow to improve user privacy.

Links:

• Brave blog post explaining the feature 
• Ghacks article showing how this could be used for tracking, with eBay as an example. 

[Jon]

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[FirefoxEnjoyer]

@Jon When will a feature like this get into Firefox???