Remove the "Here is what the extension could find on the webpage" text as suggested by a comment on the addon webpage

Use the CSS object-fit property (cover) to display the og-image.

When the webpage is loading, it is not needed anymore to wait before clicking on the extension's icon to display the OG tags. The OG tags will display as soon as the webpage finishs loading.

Resolved a bug preventing the preview to display correctly on some webpages.