The new version 90 of the Firefox browser was published on 13 July 2021. This version has issues in computers running the Windows operation system if several different ID-cards are used for logging into e-services.
Logging into e-services fails, as the new Firefox version remembers the certificate of the ID-card which was used last.
For authentication by an ID-card in the Firefox browser on a shared computer:
1) the certificate storage on the computer must first be emptied or
2) automatic removal of the certificates must be selected upon installation of the software.
See the instructions: https://www.id.ee/en/article/removal-of-old-or-expired-certificates/.
