Examine source code of Twunchat

{
  "manifest_version": 2,
  "name": "Twunchat",
  "version": "0.2resigned1",
  "description": "Tired of chat on twitch? This plugin will blur and hide the chat from Twitch by default. You'll still be able to show blurred chat via native show/hide button. Just hover the chat with the cursor to unblur it.",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*"
      ],
      "js": [
        "twunchat.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8df2117a-3993-42f7-8433-f80df4208dfa}"
    }
  }
}