Content Scaler is a developer tools chrome extension. it's a free extension , it has 36 active users since released its first version, it earns an average rating of 5.00 from 2 rated user, last update is 2507 days ago.
When you check HTML content which sets fixed viewport, this extension scales the content automatically. So you do not need to move horizontal scroll bar. If you want to use it to local HTML files you need to check 'Allow access to file URLs' on Extensions page.
You could download the latest version crx file or older version files and install it.
English.
You could find more help information from content scaler support page.
You could send emails to publisher, or check publisher's website.
You could click to report abuse of content scaler.