Thanks for the detailed response. I didn't really think that the lines with 161 characters were pre-formatted. Most of the pages at HN look fine on my versi

Thanks for the detailed response. I didn't really think that the lines with 161 characters were pre-formatted. Most of the pages at HN look fine on my version of Firefox -- 27.0.1. I have understood and used the HN feature for pre-formatted simple text, say, programming language source code, and I'm sorry about indenting the URL. I'll try not to do that in the future. I would have expected that if a formatted page is too wide for the Firefox screen window, then there would be horizontal scroll bars at the bottom of the HN window in Firefox. Looking at some CSS documentation, apparently there is a CSS keyword overflow-x which controls, at least for a DIV, if there are horizontal scroll bars. In the HTML/CSS of the Web pages I've written, I said nothing about overflow-x and get scroll bars when the data to be displayed is larger than the associated Firefox window. I don't know why that isn't standard on Web pages. Thanks for your help.