Examine source code of DocJump

{
  "manifest_version": 2,
  "name": "DocJump",
  "version": "0.4",
  "description": "A fuzzy-finder for methods, fields etc., in documentation pages for programming languages and software development frameworks.",
  "icons": {
    "512": "icon-512.png"
  },
  "page_action": {
    "default_title": "Open DocJump",
    "default_icon": {
      "16": "icon-16.png",
      "19": "icon-19.png",
      "24": "icon-24.png",
      "32": "icon-32.png",
      "38": "icon-38.png"
    },
    "show_matches": [
      "https://docs.oracle.com/*",
      "https://docs.spring.io/*",
      "https://projectreactor.io/*",
      "https://docs.python.org/*",
      "https://docs.docker.com/*",
      "https://nodejs.org/api/*",
      "https://jestjs.io/*",
      "https://golang.org/pkg/*"
    ]
  },
  "permissions": [
    "https://docs.oracle.com/*",
    "https://docs.spring.io/*",
    "https://projectreactor.io/*",
    "https://docs.python.org/*",
    "https://docs.docker.com/*",
    "https://nodejs.org/api/*",
    "https://jestjs.io/*",
    "https://golang.org/pkg/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "_execute_page_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+J",
        "mac": "MacCtrl+Shift+J"
      },
      "description": "Open DocJump"
    }
  }
}