Firefox 87.0

> To prevent user data loss when filling out forms, we’ve disabled the Backspace key as a navigation shortcut for the back navigation button. To re-enable the Backspace keyboard shortcut, you can change the about:config preference browser.backspace_action to 0. You can also use the recommended Alt + Left arrow (Command + Left arrow on Mac) shortcut instead.

> The “Highlight All” feature on Find in Page now displays tick marks alongside your scrollbar that correspond to the location of matches found on that page.

Finally! Now if they change the awful default search highlighting color scheme from green/magenta to something less confusing that would be great. (I know you can muck around the configs, but it's way too complicated for normal users).