Examine source code of RepairShopr+

{
  "manifest_version": 2,
  "name": "RepairShopr+",
  "description": "RepairShopr service extension for improved functionality and quality features.",
  "version": "1.7",
  "icons": {
    "16": "/assets/logo/icon-16x16.png",
    "32": "/assets/logo/icon-32x32.png",
    "48": "/assets/logo/icon-48x48.png",
    "128": "/assets/logo/icon-128x128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.repairshopr.com/*"
      ],
      "js": [
        "/scripts/global.js",
        "/scripts/colorManager.js"
      ]
    },
    {
      "matches": [
        "https://*.repairshopr.com/tickets"
      ],
      "js": [
        "/scripts/tickets.js",
        "/scripts/charges.js"
      ],
      "css": [
        "/styles/charges.css"
      ]
    },
    {
      "matches": [
        "https://*.repairshopr.com/tickets/0*",
        "https://*.repairshopr.com/tickets/1*",
        "https://*.repairshopr.com/tickets/2*",
        "https://*.repairshopr.com/tickets/3*",
        "https://*.repairshopr.com/tickets/4*",
        "https://*.repairshopr.com/tickets/5*",
        "https://*.repairshopr.com/tickets/6*",
        "https://*.repairshopr.com/tickets/7*",
        "https://*.repairshopr.com/tickets/8*",
        "https://*.repairshopr.com/tickets/9*"
      ],
      "js": [
        "/scripts/charges.js"
      ],
      "css": [
        "/styles/charges.css"
      ]
    },
    {
      "matches": [
        "https://*.repairshopr.com/registers/*/close",
        "https://*.repairshopr.com/registers/*/open"
      ],
      "js": [
        "/scripts/pos.js"
      ],
      "css": [
        "/styles/ui/checkbox.css"
      ]
    },
    {
      "matches": [
        "https://*.repairshopr.com/payments/new*"
      ],
      "js": [
        "/scripts/payments.js"
      ],
      "css": [
        "/styles/payments.css",
        "/styles/ui/toggle.css",
        "/styles/ui/checkbox.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "/scripts/background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_title": "RepairShopr+ Settings",
    "default_popup": "/pages/popup/popup.html",
    "default_icon": {
      "16": "/assets/logo/icon-16x16.png",
      "48": "/assets/logo/icon-48x48.png",
      "128": "/assets/logo/icon-128x128.png"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "contextMenus",
    "alarms",
    "https://*.repairshopr.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7e816f69-ec53-4251-af29-278fcdd6ed14}"
    }
  }
}