View source for Popups not blocked

===Conventional popups===
Conventional popups can be blocked using a [https://addons.mozilla.org/en-US/firefox/search/?q=pop-up+blocker popup blocker] extension.  Alternatively, you can use the [https://addons.mozilla.org/firefox/addon/noscript/ NoScript] extension to allow only certain sites to use JavaScript, or you can use the [https://addons.mozilla.org/firefox/addon/adblock-plus/ Adblock Plus] extension with filters applied.