You can change where you want your tabs to open in your settings ( Tools = Options = Tabs ) Check it out.
but, if I want them to open in the background
, they automatically open last tab to the right.
I do like in FF that if you close a tab it jumps to the neighbouring one,
as opposed to in Opera where it jumps to last used -
a pain in the ass if you're trying to systematically close tabs.
Of course Opera has (or should have*) the thing where if you click on current tab it will jump to last selected tab which is really
*I say should have cause the last couple of updates this works for a while (for me), then gives up, & thats with 2 fresh installs (one for Opera 9, a second seperate install cause Profiles dont work in Opera 9)
pros & cons ...