This is sort of tangential to coding, but programmers often do \"view source\" on their own pages and on others\' pages. I learned that when you do the normal View Source in
To extend @Techn4k's answer: If you have those two properties set, but still get the re-GET or re-POST behavior, clear your browser cache: Go to about:preferences#advanced
, click on the network tab, and click clear now
(or similar) on the cache information part.
This lets Firefox fetch and cache the page, so that no re-GET or re-POST appears.