Is there a bookmarklet (or similar) that allows me to easily make and delete small marks on the screen?

Question

Let's suppose that, hypothetically, you were playing an online browser-based version of Minesweeper in which there was no capacity to flag a square as a mine. Is there a bookmarklet that would more or less let you do this? (That is, make a small mark somewhere on the screen that you could easily later remove, for the purpose of keeping track of spatial information.)

I haven't been able to come up with any good search terms for finding something like this. The closest thing I can find is a text highlighter.

Answer 1

You could try out Scribblet It's not a Chrome Extension it is a bookmarklet.

Scribblet is a bookmarklet that lets you scribble on any web page. It also allows you to share your scribbles with other people.

I'm not sure if you are looking for a "remove all markers" or "remove the last marker" type of functionality.