Google Chrome (1 Viewer)

I downloaded it today, being using it a little, find it quite good but I need some help with something on.

when ever i click on a link i keep getting a bar in the bottom corner, that comes on for a second then flashes off, find it quite annoying, does anybody know what it is??

Also can someone tell me how to customize the top bars/tabs, i'm finding it quite hard to see what tab i'm using as they just seem to blend into each other.

i'm stuck again,

On IE on the back button, theres a drop down menu so you can pick what webpage you need to go back onto, but nothing on chrome, Is there an option i need to tick to get a button so i can have a drop down menu to select the page i need.