This extension flags results on Google Scholar and PubMed when they come from a journal on a centralized watch list. Inclusion on the watch list may be due to lack of adequate peer review or other fundamental standards of scientific publishing integrity. There are definitely false negatives, and there may be false positives. You can now also filter PubMed search results by journal impact factor. To do this, go to the extension options and set an impact factor threshold and also upload a list of journal impact factors for the extension to use (CSV format). See screenshots for details. Submit corrections and comments to davidaustincraig@gmail.com. Thank you!