Question: Google Toolbar is a web browser toolbar for Internet Explorer, developed by Google, it was first released in which year, for Internet Explorer 5 (IE5), is a graphical web browser and one of the main participants of the first browser war?
Sentence (from "Browser extension"): Browser extensions can change the user interface of the web browser without directly affecting viewable content of a web page; for example, by adding a browser toolbar.
Relevant evidence: No