Google Chrome

1. At the top right, click the 3 dots
2. Click Delete browsing data...
3. At the top, choose a time range. To delete everything, select All time.
4. Next to "Cookies and other site data" and "Cached images and files," check the boxes.
5. Click Clear data.
6. Close out of all Google Chrome windows.

Microsoft Edge

1. In Edge, select Settings and more  in the upper right corner of your browser window. 
2. Select Delete browsing data.
3. Under Time range, select All Time.
5. Make sure Cookies and other site data and Cached images and files are selected
6. Select Clear Now
7. Close out of all Microsoft Edge windows

Firefox

1. At the top right select the 3-bar hamburger menu, then Settings
2. Select Privacy and Security
3. Under Cookies and Site Data select Clear Browsing Data.

4. For When select everything.
5. Select Cookies and site data and Temporary cached files and pages. 
6. Select Clear
7. Close out of all Firefox windows.

Safari on MacOS

Clear your cache and cookies in Safari on Mac - Apple Support

Safari on iOS

Delete your Safari history, cache, and cookies on iPhone - Apple Support