Examine source code of See The Truth!

{
  "manifest_version": 2,
  "name": "See The Truth!",
  "version": "1.1",
  "description": "Show a sidebar with the community-edited truth about a site or URL! Install now.",
  "icons": {
    "48": "icons/seethetruth-48.png"
  },
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "https://*/*"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "19": "icons/seethetruth-19.png",
      "38": "icons/seethetruth-48.png"
    },
    "default_title": "Site information"
  },
  "sidebar_action": {
    "default_title": "Truth about the site",
    "default_panel": "sidebar.html",
    "default_icon": "icons/seethetruth-48.png"
  },
  "web_accessible_resources": [
    "sidebar.html",
    "create-page.html"
  ],
  "permissions": [
    "tabs"
  ]
}