JustBlock
Block intrusive ads, unwanted popups and trackers. Free core protection with optional Max Clean page cleanup.
The pitch, and what the numbers say
JustBlock – Ad & Popup Blocker — Workflow · https://justblock.org
No revenue figure: see why on the full x-ray.
Why users leave
The free diagnosis shows the top complaint. The full brief has every cluster, the build ideas and the buyers.
Updated JustBlock Security silently blocks legitimate jQuery getScript dynamic loading, breaking interactive site elements; reviewer removed the extension over reliability concerns.
“Silent failures of legitimate functionality on Web sites is concerning, so I am removing the extension from my Web browser for now.”
What a challenger would build
Closest alternatives
Who is buying right now
3 buyer threads in the same market in the last 30 days, with links and excerpts in the full brief.
Full 1-star breakdown with verbatim quotes, the build blueprint and every live thread — on every product.
How to read this
Sources: the product's public listing and reviews, its published price, and public forum threads. Revenue is an estimate unless marked verified by the founder; the formula and its inputs are on the full x-ray. Complaints are grouped by a language model and each quote is a verbatim excerpt, linked to the original review. Build difficulty is a model's reading of the listing and the complaints, not a measurement. Figures are a snapshot of Nov 2, 2026. Corrections: corrections.