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# Context ID
A context ID is a UUID that is used when making requests to MARS or to Merino to help reduce click fraud.
The **Context ID Rust component** creates a shared mechanism for managing context IDs, and to allow them to be rotated after they have exceeded some age.
It is currently under construction and not yet used.
## Tests
Tests are run with
```shell
cargo test -p context_id
```
## Bugs
We use Bugzilla to track bugs and feature work. You can use [this link](bugzilla.mozilla.org/enter_bug.cgi?product=Firefox&component=New Tab Page) to file bugs in the `Firefox :: New Tab Page` bug component.