Simon Willison’s Weblog

Hide Mozilla Flash ads

6th November 2002

Michel: How to hide Flash banner ads in Mozilla using a few lines of CSS added to the userContent.css file. A great example of CSS2 selectors at work.

Posted 6th November 2002 at 1:15 am · Follow me on Mastodon, Bluesky, Twitter or subscribe to my newsletter

More recent articles

Thoughts on OpenAI acquiring Astral and uv/ruff/ty - 19th March 2026
GPT-5.4 mini and GPT-5.4 nano, which can describe 76,000 photos for $52 - 17th March 2026
My fireside chat about agentic engineering at the Pragmatic Summit - 14th March 2026

This is Hide Mozilla Flash ads by Simon Willison, posted on 6th November 2002.

Next: CMS roundup

Previous: Funky new use for CSS backgrounds

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe

Previously hosted at http://simon.incutio.com/archive/2002/11/06/hideMozillaFlashAds