Examine source code of Bobble

{
  "manifest_version": 2,
  "name": "Bobble",
  "version": "0.12.2",
  "default_locale": "en",
  "applications": {
    "gecko": {
      "id": "{d2ec9aa0-29b3-4c1a-9d87-b4f415512cbd}",
      "strict_min_version": "55.0"
    }
  },
  "description": "__MSG_extensionDescription__",
  "homepage_url": "https://bitbucket.org/lebernie/bobble/",
  "icons": {
    "48": "icons/bobble-48.png"
  },
  "background": {
    "scripts": [
      "search/js/background-script.bundle.js"
    ]
  },
  "chrome_settings_overrides": {
    "homepage": "search/search_page.html"
  },
  "chrome_url_overrides": {
    "newtab": "search/new_tab.html"
  },
  "options_ui": {
    "browser_style": true,
    "page": "search/options.html"
  },
  "permissions": [
    "<all_urls>",
    "storage",
    "cookies",
    "webRequest",
    "webRequestBlocking"
  ]
}