Looking for Chrome extensions that do specific things

For various reasons, I decided to give Chrome a try to see if I'd prefer it to Firefox. There are some things I don't like that can probably be fixed with extensions:

• When I close a tab, I want to go to the tab to the right of the tab I closed. Currently if there are tabs I opened from the current tab*, then closing the current tab switches to one of them instead. Even when they are loading but there are multiple, fully loaded, tabs in between.
• It asks me when I want to open too many tabs at one go. I want to increase the threshold that causes that dialog to appear.

*I've got an extension that makes them open on the right of the tab bar. Which is where I want them to open.

Does anyone know of Chrome extensions, or other methods, that could help me ?

If there are, then I plan to use Chrome for a few days then decide if I like it. If there is no way to deal with these annoyances, then I will be sticking with Firefox.