Check if viewer is embedded only once and cache the result
Disable Chrome extension for non-GET requests
Merge pull request #3495 from Snuffleupagus/check-if-viewer-embedded

Check if viewer is embedded only once and cache the result
Merge pull request #3514 from Rob--W/crx-viewer-GET-only

Disable Chrome extension for non-GET requests
Keep current scroll position when zooming the document