When website address are a bit long and do not fit into one line. Two scroll bars appear.
The "Next Page" and 芦 Previous Page 禄 buttons are no longer visible.

@delphine-graeff thanks for the screenshot.
I'm not sure it's related to adress width as they all seems a lot shorter than the UI. It might be related to your Firefox version. Please check #129 for details.
Ok, The issue here is longer URL are wrapping instead of using text-overflow: ellipsis or a shortening mechanism
The height of the extension wasn't enougth
I can reproduce this problem today.
It will be fixed in a week, when mozilla will accept LessPass addon 2.3.5