I use Google Chromium and was annoyed and having the 'about:linux-splash' tab open each time. So I got rid of it by entering my homepage in the startup command.Here's how I did it for anyone that's interested.
Desktop Icon- Right click over the desktop icon
- Select Properties
- Click on the Application tab
- Go to the end of the entry in the Command: field - you should see %u
- delete %u and replace with your homepage url - mine is www.google.com/ig
- If you don't have %u then just press space then enter your homepage url as above
- Click OK
Menu Entry- Open the Kmenu
- Locate and right click over the menu entry for Chromium
- Select 'Edit Item'
- Go to the end of the entry in the Command: field - you should see %u
- delete %u and replace with your homepage url - mine is www.google.com/ig
- If you don't have %u then just press space then enter your homepage url as above
- Click on the Save icon in the toolbar, or select Save from the File menu, or press Crtl+S
Hope that helps
Regards