I just do not like seeing the thumbnails pop up on my screen. It takes time to go through and delete each one. I am new to firefox because my computer was compromised and my original browser was corrupted. I do not want anyone to observe personal information that pops up on those thumbnails. Please tell a lay person the steps to shut them down. Thank you!
Solved! Go to Solution.
Thank you, Philipp. I was able to complete the steps provided in your solution.
Note that this only hides the about:newtab page, but Firefox is most likely still generating the thumbnail.
You can create these Boolean prefs on the about:config page if you want to disable the thumbnails on the about:newtab page.
You may need to delete the thumbnails folder in the Firefox profile folder to remove already stored icons.
You can use this button to go to the Firefox profile folder:
Type about:config in the location (address) bar and press the "Enter" key to open the about:config page, just like you open a website by typing the URL in the location bar.
That way you only hide the new tab page, but you still have this about:newtab page and also Firefox is still generating the thumbnails, so click the grid icon will immediately display your recently visited web pages with thumbnails.