Chrome: If you read a lot of long articles online then you've likely had to leave in the middle of reading only to struggle to find your exact place when you return. YouRhere is a simple Chrome extension that allows you to mark the line you left off on with a double-click.
On top of saving the exact line you left off on, youRhere also saves the page itself so you can quickly head back to it. To remove a marker, just double-click the same line marked before. If you spend your day reading a lot of long articles online, youRhere comes in handy for not just saving the articles, but also the exact spot you left off at.