how to add extension logo of chrome
{
"manifest_version": 2,
"name": "Demo",
"description": "This is demo.",
"version": "1.0",
"icons": {
"16": "icon16.png",
"48": "icon48.png",
"128": "icon128.png"
},
"browser_action": {
"default_popup": "popup.html"
},
"permissions": ["activeTab", "storage"]
}