Detect FirstImpression.io
FirstImpression.io is a customized ad placements for publisher websites on their platform, with zero technical work.
01
Websites using FirstImpression.io
2 hostnames in the PluginView corpus for this technology.
| Hostname | Last seen |
|---|---|
| birgun.net | 8/3/2026 |
| unotv.com | 8/5/2026 |
02
What a detection means
- Establishes
- One or more public signals on the scanned page matched a known FirstImpression.io signature at the time of the scan.
- Does not establish
- A sitewide install of FirstImpression.io, an active vendor contract, exclusive use, or that FirstImpression.io is still in place today.
03
How to check a site for FirstImpression.io
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest FirstImpression.io signals.
- 2. PluginView reads only public responses and scores them against proprietary FirstImpression.io fingerprints. Rule bodies and identifiers are not published.
- 3. Review the confidence score and text explanation for FirstImpression.io on the results page.
04
FAQ: detecting FirstImpression.io
- Can PluginView detect FirstImpression.io without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for FirstImpression.io. It does not bypass authentication or paywalls.
- What category is FirstImpression.io?
- FirstImpression.io is classified under Advertising in the PluginView directory.
- Does PluginView publish FirstImpression.io fingerprint rules?
- No. Detection uses proprietary fingerprint rules that are not published. Scan results explain matches in plain language without disclosing rule bodies or identifiers.
