Examine source code of Surpass

{
  "name": "Surpass",
  "version": "0.22",
  "manifest_version": 2,
  "description": "Secure, unobtrusive, rapid password management",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": "icon-48.png",
    "default_title": "Surpass",
    "default_popup": "options.html"
  },
  "icons": {
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "contentMain.js",
    "sha256.js",
    "icon-19.png",
    "icon-disabled.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{449785c5-ab64-4833-92bf-248728717faa}",
      "strict_min_version": "68.0"
    }
  }
}