Why does URL redirect permission work in Chrome Manifest v2 but not v3?

Question

I'm trying to redirect a URL using the Chrome declarativeWebRequest API but it does not work.

The match pattern in the "permissions" key worked with Manifest V2 but it's now throwing a Permission '*://www.youtube.com/*' is unknown or URL pattern is malformed error in V3.

manifest.json:

{
  "manifest_version": 3,
  "name": "Redirect Test",
  "version": "0.0.1",
  "permissions": [
    "declarativeNetRequest",
    "*://www.youtube.com/*"
  ],
  "host_permissions": [
    "*://www.youtube.com/*"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "1",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  }
}

rules.json:

[
    {
        "id": 1,
        "priority": 1,
        "action": {
            "type": "redirect",
            "redirect": {"url": "https://www.google.com"}
        },
        "condition": {
            "urlFilter": "*://www.youtube.com/*",
            "resourceTypes": [
                "main_frame"
            ]
        }
    }
]

I'm using Chrome 88.0.4324.104

Answer 1

The manifest documentation for declarative net requests at the time of posting isn't exactly accurate.

This is the Permissions key in manifest.json from the documentation:

"permissions": [
    "declarativeNetRequest",
    "declarativeNetRequestFeedback",
    "*://example.com/*"
  ],

However, the site should be specified in just host_permissions instead:

"host_permissions": [
    "*://example.com/*"
  ],

It should be noted that this explicit declaration is only necessary if action.redirect is specified like in this example:

{
        "id": 1,
        "priority": 3,
        "action": {
            "type": "redirect",
            "redirect": {
                "regexSubstitution": "www.youtube.com/embed/"
            }
        },
        "condition": {
            "regexFilter": "(www\\.youtube\\.com\/watch\\?v=)",
            "resourceTypes": [
                "main_frame"
            ]
        }
}