Rated 2 out of 5 stars
About the tab skipping issue I wrote about before; false alarm, it was another addon causing the issue.
However there is another glaring issue that makes this addon unusable: When typing in some text boxes, if I type 1 or 2, it will switch tabs, making it impossible to type 1 or 2 in said text box. This may not happen with all text boxes but if you want to test this issue for yourself, just try in the diablofans.com forum. Opera does not have this issue with its single-key shortcuts, as it won't switch tabs if a text box is highlighted (which is how this addon should behave)
Ultimately I cannot use this addon until this issue is addressed.