Colour-blind aid (Cblaid)

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Colour-blind aid (Cblaid)",
  "short_name": "Cblaid",
  "version": "1.0",
  "description": "Cblaid, provides a range of colour filters to try and help improve the contrast between foreground and background colours.",
  "browser_action": {
    "default_icon": "/img/icon.png",
    "default_popup": "background.html",
    "default_title": "Cblaid"
  },
  "background": {
    "scripts": [
      "js/eventPage.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [],
      "js": [
        "js/filters.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "filters.svg"
  ],
  "permissions": [
    "background",
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "icons": {
    "16": "/img/icon-16.png",
    "48": "/img/icon-48.png",
    "128": "/img/icon-128.png"
  }
}