manifest.json

{
    "manifest_version": 2,
    "name": "ExportTabs",
    "version": "0.9",

    "description": "Export/Import Tabs",
    "icons": {
        "48": "icons/export48.png"
    },

    "permissions": [
        "tabs",
        "activeTab",
        "<all_urls>"
    ],

    "applications": {
        "gecko": {
            "id": "938745934875@example.com"
        }
    },

    "browser_action": {
        "default_icon": "icons/export.png",
        "default_popup": "popup/popup.html"
    }
}