Problem: You work in an office. You may occasionally browse non-work websites. These websites may occasionally link to pages that may be Not Safe For Work (NSFW).

Proposal: If websites indicated somehow that links (and the link text) were NSFW, your browser could screen them out or tone them down to avoid embarrassing you or costing you your job. *

Solution: The NSFW Firefox extension. It checks each page for links that are indicated to be NSFW, either with rel="nsfw" or class="nsfw", and applies a set of CSS rules to the links. These customizable rules could remove the links entirely, make them semi-transparent, or even make them stand out more, if that's what you're going for.

* Or you could, you know, just not view non-work websites at the office. :-)