View pretty CSV directly from within Firefox and Thunderbird.
What is FireCsv?
FireCsv is a Firefox add-on that enables you to view CSV files in a visually appealing manner without the need to download them. It provides a convenient way to preview and interact with CSV data from Firefox and Thunderbird.
FireCsv 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 FireCsv if you trust the publisher.
FireCsv has earned a fairly good reputation and likely can be trusted.