Examine source code of avgle_catcher

{
  "description": "catch avlge video m3u8 u3u8",
  "manifest_version": 2,
  "name": "avgle_catcher",
  "version": "1.2resigned1",
  "homepage_url": "https://github.com/mdn/webextensions-examples/tree/master/http-response",
  "icons": {
    "48": "pen.svg"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "https://avgle.com/video/*",
    "downloads",
    "notifications",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "applications": {
    "gecko": {
      "strict_min_version": "57.0a1",
      "id": "{cbbc01e2-8593-46b5-b41b-d801fe2c04d8}"
    }
  }
}