Examine source code of Free Password Manager

{
  "name": "Free Password Manager",
  "short_name": "Free Password Manager",
  "author": "programmer",
  "version": "1.0.0",
  "description": "Free Password Manager",
  "applications": {
    "gecko": {
      "id": "programmer1@gmail.com",
      "strict_min_version": "52.0"
    }
  },
  "icons": {
    "16": "icon2.png",
    "32": "icon2_2x.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "default_locale": "en_US",
  "omnibox": {
    "keyword": "lp"
  },
  "permissions": [
    "tabs",
    "idle",
    "notifications",
    "contextMenus",
    "storage",
    "nativeMessaging",
    "privacy",
    "webRequest",
    "webNavigation",
    "webRequestBlocking",
    "http://*/*",
    "https://*/*"
  ],
  "optional_permissions": [
    "clipboardWrite"
  ],
  "background": {
    "page": "background.html"
  },
  "content_security_policy": "default-src 'self'; frame-src 'self' https://lastpass.com/ https://lastpass.eu; connect-src 'self' https://lastpass.com/ https://accounts.lastpass.com wss://*.lastpass.com wss://*.lastpass.eu https://*.lastpass.com https://lastpass.com https://lastpass.eu https://login.microsoftonline.com https://graph.microsoft.com https://login.microsoftonline.us https://graph.microsoft.us https://*.oktapreview.com https://*.okta.com https://*.okta-emea.com https://*.pingone.com https://*.pingone.ca https://*.pingone.eu https://*.pingone.asia https://accounts.google.com https://www.googleapis.com https://openidconnect.googleapis.com https://content.googleapis.com; img-src 'self' data: blob: https://lastpass.com/  https://images.mxpnl.com https://content.product.lastpass.com; style-src 'self' 'unsafe-inline' https://content.product.lastpass.com https://lastpass.com/ ;",
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "file:///*"
      ],
      "js": [
        "onloadwff.js",
        "web-client-content-script.js"
      ],
      "all_frames": true,
      "run_at": "document_start"
    },
    {
      "all_frames": true,
      "js": [
        "/js/1.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "match_about_blank": true,
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://lastpass.com/acctsiframe.php*",
        "https://lastpass.eu/acctsiframe.php*"
      ],
      "js": [
        "acctsiframe-content-script.js"
      ],
      "all_frames": true,
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://lastpass.com/acctsiframe.php*",
        "https://lastpass.com/update_phone.php*",
        "https://lastpass.com/misc_challenge.php*",
        "https://lastpass.com/?securitychallenge=1*",
        "https://lastpass.com/delete_account.php*",
        "https://lastpass.com/otp.php*",
        "https://lastpass.com/enterprise_options.php*",
        "https://lastpass.com/?&ac=1*",
        "https://lastpass.com/?ac=1*",
        "https://lastpass.com/enterprise_users.php*",
        "https://lastpass.com/misc_login.php*",
        "https://lastpass.eu/acctsiframe.php*",
        "https://lastpass.eu/update_phone.php*",
        "https://lastpass.eu/misc_challenge.php*",
        "https://lastpass.eu/?securitychallenge=1*",
        "https://lastpass.eu/delete_account.php*",
        "https://lastpass.eu/otp.php*",
        "https://lastpass.eu/enterprise_options.php*",
        "https://lastpass.eu/?&ac=1*",
        "https://lastpass.eu/?ac=1*",
        "https://lastpass.eu/enterprise_users.php*",
        "https://lastpass.eu/misc_login.php*"
      ],
      "js": [
        "fedlogin-content-script.js"
      ],
      "all_frames": true,
      "run_at": "document_start"
    }
  ],
  "browser_action": {
    "browser_style": false,
    "default_icon": {
      "16": "icon_gray2.png",
      "32": "icon_gray2_2x.png"
    },
    "default_title": "LastPass",
    "default_popup": "webclient-popover.html"
  },
  "options_ui": {
    "browser_style": false,
    "page": "tabDialog.html?dialog=preferences&cmd=open",
    "open_in_tab": true
  },
  "manifest_version": 2,
  "web_accessible_resources": [
    "overlay.html",
    "contentScriptDialog.html",
    "backgroundFrame.html",
    "contentScriptPopup.html",
    "betterContentScriptPopup.html",
    "webclient-infield.html",
    "general.css",
    "tip_context.html",
    "images/icon48.png",
    "images/formfill16x16.png",
    "images/generate16x16.png",
    "images/sites16x16.png",
    "images/close16x16.png",
    "1minsignup/doNotCloseOverlay.html",
    "xhrExtension.js",
    "migrationPopup.html",
    "content-script/views/basic-auth/basic-auth.html",
    "content-script/views/basic-auth/style.css",
    "images/basic-auth-image.png",
    "images/LP-Logo.png",
    "images/lp-dots.png",
    "images/infield/password-light.png",
    "images/infield/password-light-1.png",
    "images/infield/password-light-2.png",
    "images/infield/password-light-3.png",
    "images/infield/password-light-4.png",
    "images/infield/password-light-5.png",
    "images/infield/password-light-6.png",
    "images/infield/password-light-7.png",
    "images/infield/password-light-8.png",
    "images/infield/password-light-9.png",
    "images/infield/password-dark.png",
    "images/infield/password-dark-1.png",
    "images/infield/password-dark-2.png",
    "images/infield/password-dark-3.png",
    "images/infield/password-dark-4.png",
    "images/infield/password-dark-5.png",
    "images/infield/password-dark-6.png",
    "images/infield/password-dark-7.png",
    "images/infield/password-dark-8.png",
    "images/infield/password-dark-9.png",
    "images/infield/fill-light.png",
    "images/infield/fill-dark.png",
    "images/infield/generate-light.png",
    "images/infield/generate-dark.png"
  ]
}