Create guidelines on websites to check alignment for example.
What is PageLiner?
PageLiner is a Firefox add-on by pageliner.com. This add-on has 65 daily active users, a poor user rating of 2.33, and was removed from Firefox Browser Add-ons 4 months ago. The latest version, 1.6.5, was updated 2 years ago.
PageLiner is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install PageLiner if you trust the publisher.
PageLiner may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.