Highlighting with the mouse is full of glitches. It never works right. It either stops highlighting or highlights opposite the direction I'm moving the mouse. I need to summarize a recent medical encounter; the hospital's 234 pages are out of temporal order and have many repeats. I want to put it in time order and delete the repeats. It's a PDF, and since I can't use Acrobat anymore, I read PDFs in Firefox. Not once have I been able to mark a section of text properly. There seem to be some forbidden areas: I highlight what I can, transfer it, then go back for the rest, but it won't highlight. Ctl-A highlights it. I often do that and delete the excess, but that's inconvenient. I can open the same file in xpdf and mark without trouble, but I don't like xpdf. For this doc, I converted the PDF to text with pdf2text, but it's harder to read. I identify target text in Firefox, then find it in the text version, use emacs to copy from the original to my summary. I've tried a fresh battery in the mouse. Every other app works.