Tally counter

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Tally counter",
  "version": "1.2.1",
  "description": "Easy & intuitive tally counter for keeping track of anything you want.",
  "manifest_version": 2,
  "permissions": [
    "declarativeContent",
    "notifications",
    "storage"
  ],
  "content_security_policy": "script-src 'self' 'sha256-5As4+3YpY62+l38PsxCEkjB1R4YtyktBtRScTJ3fyLU='; object-src 'self'",
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon48.png"
    },
    "default_popup": "index.html"
  },
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon48.png"
  },
  "commands": {
    "0inc": {
      "suggested_key": {
        "default": "Alt+1",
        "mac": "MacCtrl+1"
      },
      "description": "First item +1"
    },
    "1inc": {
      "description": "Second item +1"
    },
    "2inc": {
      "description": "Third item +1"
    },
    "3inc": {
      "description": "Fourth item +1"
    },
    "4inc": {
      "description": "Fifth item +1"
    },
    "0zdec": {
      "suggested_key": {
        "default": "Alt+Shift+1",
        "mac": "MacCtrl+Shift+1"
      },
      "description": "First item -1"
    },
    "1zdec": {
      "description": "Second item -1"
    },
    "2zdec": {
      "description": "Third item -1"
    },
    "3zdec": {
      "description": "Fourth item -1"
    },
    "4zdec": {
      "description": "Fifth item -1"
    },
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+T",
        "mac": "MacCtrl+T"
      }
    }
  }
}