TabSize tab-width extension

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "TabSize tab-width extension",
  "version": "1.0.0",
  "description": "For change width of the tab character in Pull/Merge Requests on GitHub/Gitlab/BitBucket",
  "manifest_version": 2,
  "icons": {
    "128": "icon128.png"
  },
  "permissions": [
    "activeTab",
    "declarativeContent",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "run_at": "document_end",
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ],
  "options_page": "options.html",
  "page_action": {
    "default_popup": "popup.html"
  }
}