Go Back with Backspace 2.0

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "1.0.0",
  "manifest_version": 3,
  "offline_enabled": true,
  "name": "Go Back with Backspace 2.0",
  "permissions": [
    "storage"
  ],
  "short_name": "Backspace 2.0",
  "homepage_url": "https://chrome.google.com/webstore/category/extensions",
  "description": "Turn the “BACKSPACE” ⏪ key into “BACK” ⏮ navigation button.",
  "commands": {
    "_execute_action": {}
  },
  "background": {
    "service_worker": "background.js"
  },
  "action": {
    "default_title": "Backspace 2.0",
    "default_icon": {
      "16": "source/icons/16.png",
      "32": "source/icons/32.png",
      "48": "source/icons/48.png",
      "64": "source/icons/64.png"
    }
  },
  "content_scripts": [
    {
      "all_frames": false,
      "matches": [
        "*://*/*"
      ],
      "run_at": "document_start",
      "js": [
        "source/content_script/inject.js"
      ]
    }
  ],
  "icons": {
    "16": "source/icons/16.png",
    "32": "source/icons/32.png",
    "48": "source/icons/48.png",
    "64": "source/icons/64.png",
    "128": "source/icons/128.png"
  }
}