Chrome and Edge
Method 1:
Press and hold Ctrl + Shift + N while the Browser is open.
Method 2:
1.) Click on the Kebab Button ( ⋮ ) in the top-right, under the X Button.
2.) Click "New incognito window."
Note: In Edge, it's called an "InPrivate window."
Firefox
Method 1:
Press and hold Ctrl + Shift + P while the Firefox is open.
Method 2:
1.) Click the Hamburger Button ( ☰ ) in the top-right, under the X Button.
2.) Click "New Private window."
Safari
Preface:
Safari users should consider swapping to another Browser like Chrome or Firefox. Some web applications may be partially or completely incompatible with Safari.
Method 1:
Similar to Chrome and Edge, you can open a Private Window by pressing and holding Command + Shift + N while Safari is open.
Method 2:
1.) Click on "File" in the top-left.
2.) Click "New private window."