For new questions and the chat there is the functionality showing (1) in the tab if there is a new question or a new chat message. I'd like to suggest such a functionality for the review queue, either one for all review tasks or seperate ones for all of them.

• Just to clarify: do you suggest that (1) should appear on the review page if a user has it open as a new item arrives? (So the user would not end up in a webcomic) – user53153 Dec 28 '12 at 16:21
• @PavelM Yes, that is what I suggest. – Julian Kuelshammer Dec 28 '12 at 16:29

This feature has since been implemented by the userscript Review Stalker.

For those who prefer not to install a userscript, I wrote a bookmarklet with similar functionality. Having opened the review page, click the bookmarklet: the review count will be shown in the tab, and updated every 60 seconds. (Tip: open review queues in a new tab, so that the bookmarklet will keep on running.)

There are a few other review-related scripts on Stack Apps. Given that this functionality is of interest only to "power users", it is unlikely that SE will implement it natively.

Uncompressed bookmarklet code:

t=document.title;
f();
function f() {
r=new XMLHttpRequest();
r.responseType='document';
c=0;
x=e.currentTarget.responseXML;
a=x.querySelectorAll('.dashboard-item');
for (i=0;i<a.length;i++) {
c+=parseInt(a[i].children[0].innerText,10);
}
document.title='('+c+') '+t;
document.getElementById('content').outerHTML=x.getElementById('content').outerHTML;
window.setTimeout(f,60000);
};
r.open('GET',window.location.href,true);
r.send();
}

• I don't want to bump this thread, but the code above is Chrome-specific. The new version, posted here, works in both Chrome and Firefox (at least). – user147263 Aug 1 '14 at 6:27