Using the `media` function here conflicts when used in conjunction with the `img_l10n` helper, as the latter has already added the media root to the path - https://github.com/mozilla/bedrock/blob/master/bedrock/mozorg/helpers/misc.py#L113.

Maybe add a check for `settings.MEDIA_URL` at the beginning of `url` prior to calling `media()`?

This was kind of tricky to track down - probably a good idea to add tests for combining `img_l10n`/`high_res_img` and `platform_img`/`high_res_img`.