Implement minimum time on page check

[da2x]

• Only run on topmost document (not an iframe)
• Implement minimum time on page as synced setting (when available)

[da2x]

May be more like 10 seconds on a slow system because of the delay when reading from chrome.storage. I couldn’t find a good way to handle the delay in the background script without involving and complicating matter greatly with the chrome.tabs API.

[da2x]

8 second default comes from Brave. They use it as the minimum attention-time required for a page. Probably just as good of a default as anything.

[DominicMaas]

Thanks, all looks good.