An extension that changes a page and says nothing is an extension that cannot be reviewed. The report is the numbers, and the numbers are the claim.
About 1 min of reading
Write a shown report
Write the counts
Before you run it, say out loud what it will print. Then open the answer.
Write a refusal report
Before you run it, say out loud what it will print. Then open the answer.
Check the outside hosts
Before you run it, say out loud what it will print. Then open the answer.
The page is where the change is. A report where the change is is a report that needs no other window.
The hosts outside the list. Zero is the accepted claim, and zero is what the review checks.
Read, changed, refused, hosts touched. Four numbers, and four numbers is a claim.
The report is written even when the extension refuses. Written on refusal is what makes a failure readable.
Shown in the page as text. Text is what a reader of the page reads, and a reader is the reviewer.
Each one is defined here on this site. Open the entry for the full definition and the other words it points at.