https://www.comsoc.org/publications/ctn/turning-fiber-sensing-system-magic-fiber-optics-sensing

 NOTE: As I am not a HTML expert, my subject line referencing a particular HTML class could be misleading.

Running Firefox 140.8.0esr (64-bit) on Windows 10 Pro on an HP laptop. The feature/problem described works properly with Chrome and Edge. The problem occurs when accessing the following article: https://www.comsoc.org/publications/ctn/turning-fiber-sensing-system-magic-fiber-optics-sensing If the window is set wide enough, there is a sidebar displaying, "Share this content in X". If the screen is squeezed down (i.e. drag the right margin to the left) far enough, the sidebar will disappear. That feature is handled properly, but as the window width is increased and the sidebar appears, the main body of text does not wrap properly. It appears that Firefox is not compensating for the width of the sidebar. NOTE: As I am not a HTML expert, my subject line referencing a particular HTML class could be misleading.