Examine source code of jira-helper

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "jira-helper",
  "short_name": "jira-helper",
  "version": "2.16.0",
  "author": "pavel.power@gmail.com",
  "description": "jira-helper",
  "icons": {
    "16": "src/jira_helper_16x16.png",
    "32": "src/jira_helper_32x32.png",
    "48": "src/jira_helper_48x48.png",
    "64": "src/jira_helper_64x64.png",
    "128": "src/jira_helper_128x128.png"
  },
  "options_page": "options.html",
  "minimum_chrome_version": "55",
  "browser_action": {
    "default_title": "Jira Helper",
    "default_icon": "src/jira_helper_128x128.png"
  },
  "background": {
    "scripts": [
      "background.js",
      "contextMenu.js"
    ]
  },
  "web_accessible_resources": [
    "printcards.html",
    "openModal.js",
    "nativeModalScript.js",
    "img/*"
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "src/blurSensitive.css"
      ]
    }
  ],
  "permissions": [
    "storage",
    "tabs",
    "contextMenus",
    "http://*/*",
    "https://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c44ec8ee-9c38-419c-ac3d-c3596fd65676}"
    }
  }
}