(Replying to PARENT post)

Browser extension is what we originally thought for exactly the same reasons you did. We started to see some requests show up from iOS devices which didn't support extensions so that made us think MitM corporate proxies.

The diversity of cloud networks looks to be due to these being deployed by individual institutions (eg. universities, corporations etc.) rather than only run from Palo Alto Network's data centers.

We also saw slightly different configurations with different browser versions, but with the same pattern of behaviour.

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(Replying to PARENT post)

iOS has supported Safari extensions since iOS 15 (late 2021). There are far fewer extensions for Safari than Chrome or Firefox; they've been steadily adding more as Safari gets closer to the same Web Extension standard used by other browsers, but most developers still shun iOS support since the extension has to be wrapped in an iOS app rather than being loaded from the web.

https://support.apple.com/guide/iphone/get-extensions-iphab0...

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