How to switch back Windows 10 Alt+Tab window to legacy appearance

1. Launch regedit by pressing Win+R and enter "regedit" in the field.
2. Go to the following folder:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer

3. Add a DWORD named the following and set its value to 1

AltTabSettings

New Tab page as homepage in Mozilla Firefox

1. Go to Options -> General tab -> Startup section

2. Set the following settings:

• When Firefox starts: Show my home page
• Home Page: about:newtab

3. Click OK to save the changes.