Examine source code of Re-Nav

{
  "name": "Re-Nav",
  "description": "Navigation redirects for the masses.",
  "version": "0.3.0",
  "permissions": [
    "contextMenus",
    "storage",
    "tabs",
    "webNavigation"
  ],
  "options_ui": {
    "page": "options/index.html",
    "open_in_tab": true
  },
  "commands": {
    "toggleAllRedirects": {
      "description": "Toggle all redirects, this does the same as the extension icon's right-click option.",
      "suggested_key": {
        "default": "Alt+Shift+R"
      }
    }
  },
  "content_scripts": [
    {
      "css": [
        "content-scripts/share/style.css"
      ],
      "js": [
        "content-scripts/share/share.js"
      ],
      "matches": [
        "https://holllo.org/re-nav/share/"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "128": "assets/re-nav.png"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_icon": {
      "128": "assets/re-nav.png"
    }
  },
  "background": {
    "scripts": [
      "background-scripts/initialize.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "{2dd6149a-403e-4e67-9cf8-5fe64e16c909}"
    }
  }
}