The zap is a colorful flourish that can be added to Firefox themed sites to give emphasis to one word, usually in a headline.

For localization purposes the theme class for the zap goes on the parent element and the zap image is applied to any child <strong> tags.

Add the class mzp-has-zap-1, where the number 1 is the number of the zap you want. There are 18 styles to choose from.

If you want to apply the zap in a different manner, or use a zap that’s not one of the default ones you can use the zap('zap.svg') Sass mixin.


  • Zaps cannot break to a new line so they should only appear on one word. Trying to span a zap across more than one word will cause problems if text wraps.
  • The zap is flexible! It can be used on words of various lengths and fonts of different sizes.
  • Zaps will work best on large text.
  • Zaps with a lot of detail don’t work as well on short words (they will appear scrunched).
<h1 class="mzp-has-zap-1">A headline with an <strong>example</strong> zap.</h1>