Well, the response has been underwhelming so far, but fortunately the powers that be decided to restore the voting tab on the profile page: https://meta.stackoverflow.com/a/130380/182796
So a client-side extension is no longer required.
Doesn't work in Linux.
Yep, just as the title says, this extension is absolutely, 100% non-functioning on Linux.
After installing, I clicked on its icon, signed in, and saw this success message:
Congratulations, you've been successfully authenticated. Enjoy Stack Exchange Notifier!
Stack Exchange Notifier authorized!
...but the icon still has the ...
The escaping issue has been mentioned already, but I'd just like to accentuate it with a screenshot -
As you can see, the HTML is actually being rendered. In the case of an HTML comment, the content is simply not displayed, but HTML content here is being showed as an un-ordered list item.
Here is a link to the post from the screenshot.