clicking on show remote content opens new tabs in firefox

Since upgrading to Thunderbird Meadow 153.0 and 153.0.1 when I click on show remote content it opens new tabs in Firefox 153.0. and 153.0.1. The remote content does not appear in the email. Depending on the amount of remote content results in the number of new opened tabs. I have restarted both Firefox and Thunderbird without any differences in the outcome. I did not change any of the settings upgrading to version 153.0 and as far as I can remember I have not changed any settings in 20 years.