Is the software you use online not behaving exactly as you expect? Sometimes this is due to the stored files that are still on your computer. Usually this is intercepted by the developers, but it can go wrong from time to time. This is how you make sure everything is okay again:

CHROME: Remove the cache / buffer in Chrome:
Windows: CTRL + SHIFT + F5 of CTRL + F5
Mac: CMD + SHIFT + R
Or through the menu:

FIREFOX: Remove the cache / buffer in Firefox:
Use the key combination: CTRL + SHIFT + F5 of CTRL + F5
Or via the menu:

SAFARI: Remove the cache / buffer from Safari:
Or through the menu:

INTERNET EXPLORER / EDGE: Remove the cache / buffer EDGE / IE:
Or through the menu: