Rated 4 out of 5 stars
I love this add-on, however since some time ago it behaves strange. The context menu appears after 0,5 sec. waiting, but as soon as I release the button the link will open in a new tab anyway and the menu will disappear! If I disable the add-on, links keep opening in new tabs on right click regardless, but there is no context menu at all. FF 11, tab utilities, I have a lot of other add-ons as well.This review is for a previous version of the add-on (0.3.5.3.1-signed.1-signed). This user has other reviews of this add-on.
Disabled add-on should do nothing, so you probably have another add-on with similar functionality.
Please provide more information here: http://forums.mozillazine.org/viewtopic.php?f=48&t=645809 (such as data from about:support page).
And try Right Links on empty Firefox profile. If all works – problem is in one of your extensions. So you can disable extensions on by one to detect conflict.
Tab Utilities – Options – Mouse – R-click – On links: Right-click functions as Middle-click
Is it your case?