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manifest.json

{
  "name": "Backspace to go Back for Microsoft Edgeâ„¢",
  "description": "Go to previous page when clicking backspace button",
  "version": "3.0.0.3",
  "manifest_version": 3,
  "icons": {
    "48": "./icons/icon48.png",
    "64": "./icons/icon64.png",
    "128": "./icons/icon128.png",
    "256": "./icons/icon256.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "action": {
    "default_icons": {
      "48": "./icons/icon48.png",
      "64": "./icons/icon64.png",
      "128": "./icons/icon128.png",
      "256": "./icons/icon256.png"
    },
    "default_title": "backspace",
    "default_popup": "popup.html"
  },
  "options_page": "options.html",
  "background": {
    "service_worker": "background.js"
  },
  "permissions": [
    "tabs",
    "scripting",
    "activeTab",
    "storage",
    "declarativeNetRequest"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}