Manifest V3 now available on M88 Beta

Re:Manifest V3 now available on M88 Beta by vbezhenar on Thursday December 10, 2020 @03:21AM (#25371206)

You can modify headers and block requests.

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Re:Manifest V3 now available on M88 Beta by rasz on Thursday December 10, 2020 @05:46AM (#25372260)

Great news, please share how.

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Re:Manifest V3 now available on M88 Beta by vbezhenar on Thursday December 10, 2020 @07:53AM (#25373151)

https://developer.chrome.com/docs/extensions/reference/decla...

Snippet from rules.json:

    {
      "id": 1,
      "priority": 1,
      "action": { "type": "block" },
      "condition": {"urlFilter": "google.com", "resourceTypes": ["main_frame"] }
    },
    {
      "id": 11,
      "priority": 1,
      "action": {
        "type": "modifyHeaders",
        "responseHeaders": [
          { "header": "h1", "operation": "set", "value": "v4" },
          { "header": "h2", "operation": "append", "value": "v5" },
          { "header": "h3", "operation": "append", "value": "v6" }
        ]
      },
      "condition": { "urlFilter": "headers.com/12345", "resourceTypes": ["main_frame"] }
    },

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Re:Manifest V3 now available on M88 Beta by rasz on Thursday December 10, 2020 @05:46PM (#25379824)

Last time I looked Google position was: "Regarding which headers will be allowed, we'll look at the feedback from devs and the current metrics and decide. In general, we want to take a closer look at the security implications of header modification."

tldr: CSP modification was strictly forbidden. Digging in further it seems this changed somewhere in 2020 and appears to be working now https://bugs.chromium.org/p/chromium/issues/detail?id=111648...

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