PubPeer is a search tools chrome extension. it's a free extension , it has 20,000+ active users since released its first version, it earns an average rating of 3.88 from 25 rated user, last update is 875 days ago.
This plugin indicates PubPeer comments wherever they appear. A lightweight plugin to install and forget about. You will only notice that the plugin exists when it alerts you that an article has comments on PubPeer. *No affiliation with the PubMed nor any journals.
You could download the latest version crx file or older version files and install it.
English.
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You could find more help information from pubpeer support page.
You could send emails to publisher, or check publisher's website.
More about manifest_file of pubpeer.
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This is really valuable project, huge respect for the people behind it. The usability of the extension could of course be better, like all of the internet. This is an open source project and people interested about the transparency of the science can contribute by donating the project money or their expertise.
PubPeer seems like a good project and I fully agree with the idea of open comments. This browser extension works well, but is often a bit annoying: the PubPeer bar at the top of the page appears only after the page has loaded, which causes the page contents to suddenly shift down. This could be fixed by having another indicator (maybe a small fixed-pos sidebar like Scite or Hypothesis do). Another problem is mentioned by Balázs Knakker below: The PubPeer bar appears and says "There are 2 articles on this page with PubPeer comments" (neither of those comments were particularly enlightening or relevant to article I was quickly checking out). This makes the high saliency of the PubPeer bar not worth it.
Works great. I use it all the time. PubPeer is a vitally important tool for holding the practice of science to the ideals of science.