Examine source code of browser-source-provider

{
  "manifest_version": 2,
  "name": "browser-source-provider",
  "version": "1.1.1",
  "description": "browser words completion source for coc-browser",
  "author": "voldikss",
  "icons": {
    "16": "bcp.png",
    "48": "bcp.png",
    "128": "bcp.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "browser-source-provider"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true
    }
  ],
  "permissions": [
    "https://127.0.0.1/*",
    "http://127.0.0.1/*",
    "storage"
  ]
}