Examine source code of gPass

{
  "manifest_version": 2,
  "name": "gPass",
  "short_name": "gPass",
  "version": "1.3",
  "description": "gPass : global password manager",
  "icons": {
    "16": "icons/gpass_icon_16.png",
    "32": "icons/gpass_icon_32.png",
    "64": "icons/gpass_icon_64.png",
    "128": "icons/gpass_icon_128.png"
  },
  "author": "Grégory Soutadé",
  "homepage_url": "https://forge.soutade.fr/soutade/gPass",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "lib/misc.js",
        "lib/main.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "background": {
    "persistent": true,
    "scripts": [
      "lib/parseuri.js",
      "lib/misc.js",
      "compat.js",
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "browser_action": {
    "default_icon": "icons/gpass_icon_32.png",
    "default_title": "Get your password",
    "default_popup": "popup/popup.html",
    "browser_style": true
  },
  "permissions": [
    "<all_urls>",
    "activeTab",
    "notifications",
    "tabs",
    "storage",
    "clipboardWrite",
    "menus"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2cc2249d-b800-4af8-b9af-f6a2b92b4133}"
    }
  }
}