Examine source code of Docspo eSignatures

{
  "manifest_version": 2,
  "version": "1.2.1",
  "name": "__MSG_docspo_name__",
  "description": "__MSG_docspo_description__",
  "default_locale": "en",
  "homepage_url": "https://app.docspo.com",
  "browser_action": {
    "default_title": "Docspo",
    "default_icon": {
      "19": "./assets/docspo/19.png",
      "38": "./assets/docspo/38.png"
    },
    "default_popup": "./dist/popup/index.html"
  },
  "options_ui": {
    "page": "./dist/options/index.html",
    "open_in_tab": true,
    "chrome_style": false
  },
  "background": {
    "page": "./dist/background/index.html",
    "persistent": false
  },
  "icons": {
    "16": "./assets/docspo/16.png",
    "128": "./assets/docspo/128.png"
  },
  "permissions": [
    "https://*.hubspot.com/*",
    "https://*.upsales.com/*",
    "*://*.lightning.force.com/*",
    "https://*.pipedrive.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://app.hubspot.com/contacts/*",
        "https://*.upsales.com/*",
        "*://*.lightning.force.com/*",
        "https://*.pipedrive.com/*"
      ],
      "exclude_matches": [
        "https://www.pipedrive.com/*",
        "https://support.pipedrive.com/*",
        "https://community.pipedrive.com/*",
        "https://marketplace.pipedrive.com/*",
        "https://devcommunity.pipedrive.com/*",
        "https://developers.pipedrive.com/*",
        "https://oauth.pipedrive.com/*",
        "https://*.pipedrive.com/auth/*"
      ],
      "js": [
        "./dist/contentScripts/index.global.js"
      ],
      "run_at": "document_end",
      "all_frames": false
    }
  ]
}