I recently upgraded to the latest version of Firefox, as it was too slow and caused accessibility problems. Now, I cannot check checkboxes on websites after installation. I use JAWS2018 on a Windows PC computer. Particularly in tables (like those in gmail's basic html view), but not limited to them, pressing x to try and check a checkbox does not work. It reverts me back to the top of the list containing those box elements without checking it. On random occasion, it does check the box, but reads it incorrectly, meaning that I do not know, and cannot be sure, of its accuracy. Downarrowing and hitting space works, but once I try and move by checkbox element by pressing x, it becomes confused and either reads incorrectly or (especially with shiftx) does not read the choice at all. This issue does not happen with Chrom or IE; edge is just bad to begin with.