JavaScript is a big part of most modern websites, but it has its share of cons. Here's how to disable it.

Disable JavaScript from running in Firefox PDF Now, the ability to turn off JavaScript in PDF documents is effortless to get done, though not as straightforward as we would like.

BlackBerry users running the BlackBerry 6 OS should disable browser JavaScript to avoid a potential security issue, RIM says.

Finally, Firefox 23 removes the option to disable JavaScript from the Options pane -- and if you had JavaScript turned off, it has been turned back on.