Examine source code of SFChronicle Popup Unlock

{
  "manifest_version": 2,
  "name": "SFChronicle Popup Unlock",
  "short_name": "SFChronicle Popup Unlock",
  "version": "1.0.0",
  "description": "Web Extension for removing intrusive popups on San Francisco Chronicle website.",
  "homepage_url": "https://github.com/Dalimil",
  "icons": {
    "32": "assets/icons/32x32.png",
    "48": "assets/icons/48x48.png",
    "128": "assets/icons/128x128.png"
  },
  "permissions": [],
  "author": "Dalimil Hajek",
  "content_scripts": [
    {
      "matches": [
        "https://sfchronicle.com/*",
        "https://www.sfchronicle.com/*"
      ],
      "js": [
        "js/contentScript.bundle.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{dcc65968-6379-49c1-90c6-fcf0872961a3}"
    }
  }
}