Examine source code of SuperSlimFandom

{
  "manifest_version": 2,
  "name": "SuperSlimFandom",
  "version": "1.1.1",
  "description": "Removes many non-content spaces from Fandom pages to reduce bloat.",
  "content_scripts": [
    {
      "matches": [
        "*://*.fandom.com/*"
      ],
      "js": [
        "weightLoss.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{09cbed49-c467-493e-9c01-354020f9c508}"
    }
  }
}