GroupDocs Signature plugin for Gmail

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "background": {
    "scripts": [
      "./js/background.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "./js/groupdocs-javascript-min.js",
        "./js/inject.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ],
  "description": "Sign documents from gmail with GroupDocs",
  "icons": {
    "16": "./img/icon16.png",
    "48": "./img/icon48.png",
    "128": "./img/icon128.png"
  },
  "manifest_version": 2,
  "name": "GroupDocs Signature plugin for Gmail",
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*",
    "background"
  ],
  "version": "1.3.9",
  "web_accessible_resources": [
    "in-page.js",
    "in-page.css",
    "progress.png",
    "sign_ing.png",
    "save_button.png"
  ],
  "options_page": "options.html"
}