Examine source code of Link Preview Sidebar

{
  "manifest_version": 2,
  "name": "Link Preview Sidebar",
  "description": "Preview links in a sidebar instead of a new tab.",
  "version": "1.0.6",
  "permissions": [
    "contextMenus",
    "webRequest",
    "webRequestBlocking",
    "tabs",
    "<all_urls>"
  ],
  "icons": {
    "128": "images/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "src/content.js",
    "src/content.css",
    "src/embedder.html"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "link-preview-sidebar@felixfbecker"
    }
  }
}