Examine source code of SkillValue

{
  "manifest_version": 2,
  "name": "SkillValue",
  "version": "3.2",
  "description": "Displays sub-level of highest main skill in Hattrick",
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "*://*.hattrick.org/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.hattrick.org/*"
      ],
      "js": [
        "translation.js",
        "squadLineupPanel.js",
        "currencyRates.js",
        "realWageTables.js",
        "overlay.js",
        "transfer-undervalued.js",
        "content-transfer.js",
        "content.js",
        "transfer-search-polish.js",
        "charts-recolor.js",
        "playersPage_edit.js",
        "schedule.js",
        "sv-youth-best-overlay.js",
        "sv-men-minutes.js",
        "sv-men-position.js"
      ],
      "css": [
        "lineup.css",
        "overlay.css",
        "playersPage_edit.css",
        "transfer-search-polish.css",
        "sv-youth-best-overlay.css",
        "sv-men-minutes.css"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "settings.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon.png",
      "48": "icon.png",
      "128": "icon.png"
    }
  },
  "web_accessible_resources": [
    "lineup.css",
    "overlay.css",
    "playersPage_edit.css",
    "transfer-search-polish.css",
    "overlay.js",
    "page-bridge.js",
    "icon.png",
    "logo.png",
    "images/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{eeaee1c2-dfe7-4ed0-a978-ba681a1d97cb}"
    }
  }
}