Examine source code of RemoveHabrCompanies

{
  "manifest_version": 2,
  "name": "RemoveHabrCompanies",
  "version": "1.2",
  "description": "Удаление корпоративных блогов из ленты хабра",
  "icons": {
    "48": "icons/border-48.png"
  },
  "applications": {
    "gecko": {
      "id": "ek993evgeny@yandex.com",
      "strict_min_version": "45.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.habr.com/*"
      ],
      "js": [
        "remove.js"
      ]
    }
  ]
}