I do a lot of work with tables -- very simple copy/pastes from Excel dropped into HTML boxes. Editing in this method does not work at all on Macs -- somewhere between the copy and the paste, Firefox loses all of the markup in the table -- but I can live with that by only using a PC to paste tables.

However, now I find that the tables themselves (once loaded into the site by a PC) are not displaying properly on Macs running Firefox. They look perfectly fine on a PC, but the columns get all squished when you look at the exact same page on the latest Firefox for Mac. (Example is here.)This is a rare occasion where Safari for Mac works fine.

Is this just Firefox's problem? It seems every time they update the browsers, something else doesn't work like it used to.