Examine source code of jira-helper-for-ff

{
  "manifest_version": 3,
  "name": "jira-helper-for-ff",
  "short_name": "jira-helper",
  "version": "2.28.8",
  "author": "pavel.power@gmail.com",
  "description": "jira-helper",
  "icons": {
    "16": "src/assets/jira_helper_16x16.png",
    "32": "src/assets/jira_helper_32x32.png",
    "48": "src/assets/jira_helper_48x48.png",
    "64": "src/assets/jira_helper_64x64.png",
    "128": "src/assets/jira_helper_128x128.png",
    "256": "src/assets/jira_helper_256x256.png",
    "512": "src/assets/jira_helper_512x512.png"
  },
  "minimum_chrome_version": "88",
  "action": {
    "default_icon": {
      "16": "src/assets/jira_helper_16x16.png",
      "32": "src/assets/jira_helper_32x32.png",
      "48": "src/assets/jira_helper_48x48.png",
      "64": "src/assets/jira_helper_64x64.png",
      "128": "src/assets/jira_helper_128x128.png"
    },
    "default_title": "Jira Helper"
  },
  "background": {
    "scripts": [
      "service-worker-loader.js"
    ],
    "type": "module"
  },
  "web_accessible_resources": [
    {
      "matches": [
        "*://*/*"
      ],
      "resources": [
        "img/*",
        "assets/card-colors-before-1yMFUUM_.jpg",
        "assets/card-colors-after-DooiVc8t.jpg",
        "assets/jira_helper_512x512-CbljwQAS.png",
        "assets/ExtensionApiService-B54KB9oS.js",
        "assets/AdditionalCardElementsContainer-Bas-MIhb.js",
        "assets/AdditionalCardElementsBacklogContainer-B_VR5Y_i.js",
        "assets/content.ts-N-7EYaoa.js",
        "assets/IssueLinkBadges-BvYhTci7.js"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "content_scripts": [
    {
      "js": [
        "assets/content.ts-loader-CMM66yFG.js"
      ],
      "matches": [
        "*://*/*"
      ],
      "css": [
        "assets/content-Dv2MlXdR.css"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "contextMenus"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "jira-helper-firefox-new@jira-helper",
      "strict_min_version": "58.0"
    }
  }
}