Free browser extension to access journal articles behind a paywall

There's a browser extension which searches for free versions of scientific papers that are behind a paywall. It's called Unpaywall, it works on Chrome or Firefox on a desktop, it's legal and it's free. Download from this page http://www.sciencealert.com/this-ne...access-millions-of-scientific-papers-for-free

Could be useful for diabetes-related articles if you don't have institutional access.

Contralto said:

Thanks, already tried it. If it has any problem, it would be that the searches in it bring back too extensive results

Click to expand...

The way I understand is that if someone gives you a link to a paper where the full text is behind a paywall, the extension will look to see if there is a free version of that paper available. For example, the following papers were linked on the forum but the full text required registration or subscription - with the browser extension, there is a green 'open' padlock which takes you to a single version of the full paper when clicked:-

• http://jech.bmj.com/content/71/1/25
• http://stm.sciencemag.org/content/9/377/eaai8700.full

I haven't found any examples yet where more than one free version is found so, out of interest, could you give an example of link where this happens? Thanks.