Examine source code of One-click Wayback

{
    "manifest_version": 2,
    "name": "One-click Wayback",
    "description": "View cached versions of your current page in the Wayback Machine.",
    "homepage_url": "https://git.tom.tf/one-click-wayback",
    "version": "0.2",
    "icons": {
        "48": "icon.svg"
    },
    "permissions": [
	// Needed to get the current tab's URL.
        "activeTab"
    ],
    "browser_action": {
        "default_title": "One-click Wayback",
        "browser_style": true
	// TODO: Add an icon.
    },
    "background": {
        "scripts": [
            "background.js"
        ]
    },
    "browser_specific_settings": {
        "gecko": {
	    // Needed for 'browser_action' on Firefox for Android.
            "strict_min_version": "55.0",
            "id": "tom@tom.tf"
        }
    }
}