nonstandard behavior Rated 3 out of 5 stars
A tab without history (which have not the Back option) will be closed when I click by middle button on an "empty" space. And this can't be disabled.
So, when I do multi-clicking to go to the root or simply to go back several webpages, THE TAB UNENSPECTIDLY CLOSED!
When I want to close a tab, I middle-click the tab's header!
So, please, disable the such nonstandard behavior by default. Tabs should not to be closed by clicking on webpages.
New version is "Awaiting Full Review" by Firefox team.
In this version, you can customize what middle-click does.
Beta version is here: