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What is the CNRS Click & Read extension?


A web extension is an application that can be installed in your browser with just a few clicks. It is added to the list of your browser extensions and a shortcut to it can be added to your personal bar.

The Click & Read extension was developed for use with Firefox, Chrome, Opera and Safari (from OS 14).

It can also be installed on Chromium-based browsers such as Brave or Edge (from version 2021).

It functions transparently when you are browsing the Internet and does not have a search interface.


The Click & Read extension replaces and unifies the 3 existing extensions of the platforms managed by the Inist-CNRS Istex, Panist and BibCnrs, plus the free Unpaywall extension.

Since v2.0, the Click & Read extension has also integrated the documentary resources of the Inserm and the Claude Bernard Lyon 1, Orléans, Rennes 1, Limoges, Montpellier, universities the CEA, the B2RM and the Institut Pasteur.

The Click & Read extension's constant aim is to facilitate access to full text. It is a complementary mode of access to the use of BibCnrs, Istex and so forth.

This extension consults for you the following documentary collections Unpaywall (which contains the data of HAL...), Istex, Panist, BibCnrs, Insermbiblio, Lyon 1, Orléans, Rennes 1, Limoges, CEA, B2RM, Institut Pasteur, Paul-Valéry Montpellier 3, Montpellier, Unîmes, Littoral Côte d'Opale, Sciences Po, Bordeaux, Sorbonne Université, Collège de France, Pau et Pays de l'Adour, BU Sainte Géneviève, Savoie Mont Blanc, Université des antilles, Université Paris-Saclay, Université Jean Monnet Saint-Etienne, Université de Brest, Université Toulouse Capitole, Université Toulouse Jean Jaurès, Université Toulouse III - Paul Sabatier, Institut Supérieur de l’Aéronautique et de l’Espace, Institut National Universitaire Champollion, Université de Lille, Université de Lorraine, Université Paris-Est Créteil - UPEC, Université Grenoble Alpes - UGA, Université Paris Cité, Université de Toulon, La Rochelle université, Université de Strasbourg, Université Paris 8 Vincennes Saint-Denis, Ecole Centrale de Lyon, Université Lumière Lyon 2, Université de Technologie de Compiègne, Arts et Métiers Sciences et Technologies,IFP Energies nouvelles (IFPEN),, INSA Toulouse, INRAE, IMT MINES ALBI, ENAC, Avignon Université, Humathèque Condorcet, INP Toulouse, Université Rennes 2, VetAgro Sup, Université de Franche-comté, Université Paris Dauphine-PSL, Université de Caen Normandie, INSA Lyon When it detects an access to a text, the C&R logo is displayed.


Click & Read has been developed by Inist-CNRS for CNRSresearch communities and is aimed primarily at research staff in CNRS units.

However it can be used by all researchers under the supervisory authority of the MESRI, subject to access rights:

  • Resources via Unpaywall are free. There is no access fee.
  • Resources Istex resources are acquired for all MESRI institutions.
  • Resources Panist resources are acquired for the MESRI institutions that are members of the consortia.
  • BibCnrs resources are acquired for the CNRS research communities. The access rights are the same as for BibCnrs. In case of doubt, your authorised domain(s) is/are visible after you log in to BibCnrs via Janus by moving the mouse over your name at the top right of the BibCnrs homepage.


The Click & Read extension integrates the free Unpaywall which it requests by default. If there is no response from Unpaywall, the virtuous platforms Istex and Panist that provide alternative access to publishers' sites and finally, if these do not respond it searches on the parameterised document collections.

Since v2.0, it has been possible to add, delete and choose the order of the document sources queried (e.g. between a free or a publisher's version of the document).


When browsing the Internet

  • whatever the site (Google, Google Scholar, publisher sites, Wikipedia...)
  • and whatever the query (article title, authors, DOI...)
  • the Click & Read extension scans the web page you are visiting page. It only looks for the DOI, PMID, PII (Elsevier) document identifiers
  • and then searches for the document that corresponds to the identifier found in the configured document collections.
  • It then displays the C&R button if the resource is available.

You can then just click on the button to access the document.


Click on the url https://clickandread.inist.fr/

  • To install and set up the Click and Read extension on Firefox, click here
  • To install and set up the Click and Read extension on Chrome, click here
  • To install and set up the Click and Read extension on Edge, click here
  • To install and set up the Click and Read extension on Safari, click here

The Click & Read extension does not store any personal data. The following information is collected when using Click & Read - the chosen source, the URL and DOI of the document visited, the reference of the institution and the BibCnrs domain indicated by the user as well as the time stamp. This information is collected solely for usage metrics.

The Click & Read extension includes the functionality of the Istex and Panist extensions so you must uninstall these.

If you have any questions, please do not hesitate to contact the ClickandRead team.