Proving Lab
Everything published here has a method, raw data and a control run. Where a number cannot be reproduced, it does not get written down. Where something went wrong, that is the interesting part and gets written down first.
Build reports from real work — including the parts that went wrong.
1 August 2026
A wrong assumption about browser engines, a false claim caught before publication, 22 local paths one commit from a public repository, and three more. Sorted by what actually caught them — two were caught by luck, one by nothing at all.
Each with the commands to repeat it and the raw data behind it.
1 August 2026
A full-page screenshot PDF run through Tesseract and compared against the source article. Includes the resolution threshold where recognition collapses.
1 August 2026
What current PDF extensions declare in their manifests, how to verify it in 30 seconds — and the consequence nobody mentions: server-side converters cannot reach pages behind a login.
1 August 2026
One year after Mozilla warned about phished developer accounts: why the useful question is not who you trust, but what a compromised extension could reach.
Before any result counts, the method has to fail where it should. A comparison that does not distinguish the reference case measures nothing.
Numbers come with the file they were computed from, timestamped. That makes them checkable — and it means nobody has to take a claim on trust.
Where our own tool is worse — file size, processing time, missing features — it is stated before the advantages. A comparison that only flatters is worthless.
Every figure carries the date it was retrieved. Software changes; a measurement without a date quietly turns into a false claim.
Software built here, documented like anything else on this site — including what it cannot do. It appears in some of the measurements above; that is disclosed on each of them.
Firefox extension that saves a whole web page as one continuous PDF. Runs on the
device, asks for activeTab rather than all-sites access, works on
Firefox for Android. MIT licensed.
This site is run by the developer of Full Page
PDF Snap, which appears in several of the measurements above. That is stated in
each article where it is relevant, and the tool sits openly under
/tools/ rather than hidden behind neutral framing.
Figures about other products come exclusively from publicly declared data — manifests and listing descriptions — with the retrieval date given. No product was decompiled, and no claim is made about any provider's intentions. Corrections are welcome via GitHub issues and get applied.