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# Dot Mozilla Reference
This linter is to help ensure that new code that adds references to ".mozilla" does not do so without ensuring that X Desktop Group (XDG) configuration path handling is taken care of.
provides a set of environment variables as well as directories that
applications should follow to store their data: configurations, states, caches etc.
Firefox originally used `$HOME/.mozilla` but after Firefox 143 (bug 259356), it will prefer the environment variables over the legacy location.
If you are adding a path that would reference `.mozilla`, then you should:
- Contact the `OS Integration team`
- Add handling like e.g. in {searchfox}`crash reporter client application <../rev/f30ba9df8307c48346ac1038be981595bd585603/toolkit/crashreporter/client/app/src/config.rs#511-532>`
- Add an exclusion to the relevant section in {searchfox}`tools/lint/dot-mozilla-reference.yml <tools/lint/dot-mozilla-reference.yml>`
If you are adding code that uses `.mozilla` for something other than referencing the data path, then you may:
- Add an exclusion to the relevant section in {searchfox}`tools/lint/dot-mozilla-reference.yml <tools/lint/dot-mozilla-reference.yml>`
## Run Locally
The mozlint integration of codespell can be run using mach:
```{eval-rst}
.. parsed-literal::
$ mach lint --linter dot-mozilla-reference <file paths>
```
## Configuration
This linter is enabled on the whole code base. See the description above for details on handling exclusions.
## Sources
- {searchfox}`Configuration (YAML) <tools/lint/dot-mozilla-reference.yml>`