Nobody likes having to click on checkboxes, in our e-mail or on the online forms we might need to fill out.  It is a pain in the rear process, that I wish sometimes I did not have to do.  With that said, I have found one experimental add-on that promises to make the pain go away.
CheckBoxMate, an add-on for Firefox, allows you to check multiple checkboxes with ease by drawing a box around them to automatically select them all.  Here [...]

Taking a look at some of the “experimental” add-ons for Firefox, this one caught my eye.  ErrorZilla Plus looks like it is a refreshed version of the original ErrorZilla with a few more perks.

Here is a little more information from the developers…
This extension is a mod of the ErrorZilla Mod extension. I added a “Proxify” function into it. When error page shows, you can choose a web proxy from a list and browse the unreachable network address via it.  From [...]