i am unable to see any (there used to be visible boxes for me to place a check to delete or move) now i have to place my mouse in the area where i think it is. I'm unable to do multiple actions (such as delete) because it doesn't show the check in the invisible box either. Nor when i make a purchase, the check out box is visible. How do I fix this problem?
On the Network mini-tab > Cached Web Content : "Clear Now"
If you have a large hard drive, this might take a few minutes.
(2) Remove the site's cookies (save any pending work first). While viewing a page on the site:
right-click and choose View Page Info > Security > "View Cookies"
Alt+t (open the classic Tools menu) > Page Info > Security > "View Cookies"
Then try reloading the page. Does that help?
I am a little suspicious of one of your plugins, which appears on the list simply as "Flash". The official plugin is Shockwave Flash. Could you try disabling "Flash" and all other nonessential or unrecognized plugins and extensions, the restart Firefox and see whether forms work better?