Possible Duplicate:
Can I move the Unity launcher?
Try to use the back button on your browser and ever time you go up there launcher pops out and you have a battle to win against launcher so you can use your browser back button.
For example can the launcher be moved to anywhere but the left side of the screen?
This is not directly related, but if you were having troubles hitting your back button I would suggest you right click and select the back option instead. Usually this is the faster method any way.
Hope this helps.
You can try editing unity's "Reveal Sensitivity"
Using details suggested by Jeremy in the comments, click on the Gear on the top right and use System Settings->Appearance->Behaviour Tab.
The sensitivity setting is probably the best answer. But, in case it's helpfule:
Alt-Left Arrow can also be used to go back in your browser, if that's handy.
