Updating libnss3 to 2:3.36.1-1 seems to solve this issue.
Same issue with firefox-esr 52.7.3esr-1 and libnss3 2:3.33-1 since I’ve
updated Firefox (from 52.1 I believe)
Updating libnss3 to 2:3.36.1-1 seems to solve this issue.