...
- For Chrome:
- Open a new window or new tab and enter the URL URL "chrome://extensions/" (if you're not familiar with it, Chrome provides a URL-like interface to many of it's its internal settings)
- Find uBlock Origin in the card-list and de-select it by clicking the blue slider-button.
- For Firefox:
- Open a new window or new tab and enter the URL "about:addons" (as above, Firefox provides a URL-like interface to many of its internal settings)