Examine source code of AO3 Tag Blocker

{
  "manifest_version": 2,
  "name": "AO3 Tag Blocker",
  "description": "Automatically blocks added tags.",
  "version": "1.2",
  "background": {
    "scripts": [
      "background.js",
      "tagger.js"
    ]
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icon1.png",
    "default_title": "I do not want to see or be seen by ABO",
    "default_popup": "tagger.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "AO3_Tag_Blocker@example.org"
    }
  }
}