JFBC Facebook Comments - Weird fixed width of 100px on mobile screens

Hi there,

I'm using {JFBComments} to display Facebook Comments but now I see that on some small, mobile screen sizes the Facebook comments are displayed in a very narrow way using a fixed width of only 100px (see screenshot). I would like to change this, for example to 100% instead of 100px but I don't see a way of doing this.

How can this be done?

I was also doing some research online and it seems that this kind of problem ist known for Facebook comments also for other platforms like Wordpress, etc. - in case this information helps.

All help would be much appreciated!