Adicione a extensão do Chrome Icon
"icons": { "16": "icon16.png",
"48": "icon48.png",
"128": "icon128.png" },
Odd Owl
"icons": { "16": "icon16.png",
"48": "icon48.png",
"128": "icon128.png" },
"icons": {
"16": "icon16.png",
"48": "icon48.png",
"64": "icon64.png",
"128": "icon128.png"
},
"icons": {
"16": "icon16.png",
"64": "icon64.png",
"48": "icon48.png",
"128": "icon128.png"
},