Examine source code of ZkillboardFix

{
  "description": "Fix zkillboard",
  "manifest_version": 2,
  "name": "ZkillboardFix",
  "version": "1.6",
  "homepage_url": "https://zkillboard.com/character/96713211/",
  "icons": {
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "64": "icons/icon64.png",
    "96": "icons/icon96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://zkillboard.com/*"
      ],
      "js": [
        "js/onload.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "64": "icons/icon64.png",
      "96": "icons/icon96.png"
    },
    "default_title": "ZkillboardFix"
  },
  "permissions": [
    "tabs"
  ],
  "web_accessible_resources": [
    "sounds/*.*"
  ]
}