How to Remove Page Elements in Websites in Firefox

You have to install the add-on named Remove Temporarily.

After installing, simply right-click on page element that you want to remove.

Select Inspect Element option from the right-click context menu.

As you do this, the inspector tool will appear at the bottom of the page with the Remove Element button.

Click the Remove Element conveniently allows you to remove parts of a webpage of your own choice.

Remove Temporarily can be used to remove parts or items on WebPages before printing or for reading purposes.

You should note that only one element can be removed at a time.