I open up on a local copy ofShiba Inu or Toasted Marshmallow, just because it amuses me.
My browser opens to the same windows that were open when it was closed: Most often, this is my e-mail, the website for the substitute teacher job placement service, and the SDMB secret moderator page for nuking spammers.
When I open a new window, it starts up at www.google.com.
Most of my most-visited websites show up in the dropdown on the URL box, though since the latest update Firefox has really scrambled the order of the pages in that, which annoys me. Anything that doesn’t show up in the drop-down, I can get by typing the first letter of the site name.
Just yahoo. I’m always going somewhere else anyway.