> For the complete documentation index, see [llms.txt](https://docs.thousandeyes.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.thousandeyes.com/product-documentation/browser-synthetics/dual-chromium-option/why-chromium-upgrades.md).

# Why Are Regular Chromium Upgrades Needed?

Regular Chromium upgrades are needed in order for our synthetic tests to accurately mimic the true browser experience of a user, because most organizations actively ensure that the browsers on users' laptops and desktops are up to date.

In the past, both ThousandEyes and our customers have been negatively impacted by a few conditions within the Chromium open source project:

* Chromium updates are not backwards compatible with one another. In our case, this meant that transaction test scripts that worked on a previous version of Chromium might need re-working to run on a later version of Chromium.
* Updates from the Chromium open source project are not always announced ahead of time so there’s less forward visibility for teams that rely on Chromium within their own toolsets.


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