А можно я сам себе отвечу :) вдруг кому пригодится…
background.js
// Add a button to Opera's toolbar when the extension loads.
window.addEventListener("load", function() {
// Buttons are members of the UIItem family.
// Firstly we set some properties to apply to the button.
var UIItemProperties = {
disabled: false, // The button is enabled.
title: "vPass", // The tooltip title.
icon: "icon_18.png", // The icon (18x18) to use for the button.
popup: {
href: "https://www.vpass.info/?",
width: "500px",
height: "500px"
},
onclick: function()
{
var extension = window.opera.extension;
var focusedTab = opera.extension.tabs.getFocused();
var url = '';
if(focusedTab)
{
url = focusedTab.url;
button.popup.href='https://www.vpass.info/?'+url;
}
}
};
// Next, we create the button and apply the above properties.
var button = opera.contexts.toolbar.createItem(UIItemProperties);
// Finally, we add the button to the toolbar.
opera.contexts.toolbar.addItem(button);
}, false);
