Firefox is open source so that and a few others you could dive in and alter what it does on a link.
I use Maxthon and whenever I left click on a link, it is opened in a new tab.
Problem is that this works ONLY with Maxthon! All other browsers (Netscape, Firefox, Avant, Opera, Slimbrowser, Greenbrowser, Custom Internet Browser) insist on opening the link in the same tab always, in spite of the fact that I've configured all possible options to indiate that a new tab should be activated. Iive even checked manually their .ini and other preference files to make sure.
I've recently discovered that clicking the middle button does do the trick with Netscape, Slimbrowser and Firefox (only ones I've checked) but it's annoying as that button had previously been configured to open a menu (part of a media office keyboard program).
Is there any explanation for this? Why does Maxthon let me activate a new tab with a left click while all the others require the middle button?