There should be an option to either change the color of or remove that blue bar at the top of the currently active tab. I like the purpose it serves, but blue only goes with so many themes. It's also practically invisible if you already have a blue theme.
Next, there should definitely be an option to disable tips such as the "Double click to show Speed Dial" message that pops up on your screen everytime you hide it. If you're knowledgeable enough about Speed Dial to turn that option off, then you'd certainly know how to make Speed Dial show back up after you've hidden it. There's no reason for that popup to appear every single time a new tab is opened when very few users would need a constant reminder like that.
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