<a jscontroller="I190Fe" jsaction="click:Cw5dae(preventDefault=true); mouseenter:d1MnZc; mouseleave:bubzGf" jslog="10937; 6:106189944370624200140; track: click" data-profileid="106189944370624200140" class="m3JvWd" href="./106189944370624200140" id="ow1927" __is_owner="true" target="_blank" data-focusid="1927">Manu H.</a>
<a jscontroller="I190Fe" jsaction="click:Cw5dae(preventDefault=true); mouseenter:d1MnZc; mouseleave:bubzGf" jslog="10937; 6:106189944370624200140; track: click" data-profileid="106189944370624200140" class="m3JvWd" href="https://plus.google.com/communities/106189944370624200140" id="ow1927" __is_owner="true" target="_blank" data-focusid="1927">Manu H.</a>

instance.ActiveTab.KeyEvent("LeftCtrl", "down", "Ctrl");
instance.ActiveTab.MouseClick(60, 200, "left", "click");
Browser in ZennoPoster is not a regular browser.
If right mouse click is needed to trick some botguard or something like this you can add a rightclick on the link. But browser in Zenno does not open a new tab by rightclick. For this you should use Actions sequence.
You can try to rightclick on the white field in extended editor in Project Maker and follow like this by analogue:
No it's enabled in zenno and it's a keyboard shortcut. There is a 0x key assigned for it in Windows systems. Also I checked firfox and chrome support the buttonThis method is for IE browser if I'm not mistaken: instance.ActiveTab.Handle,System.Windows.Forms.Keys.BrowserBack