# MacOS Firefox image upload error

**URL:** https://meta.discourse.org/t/macos-firefox-image-upload-error/212936
**Category:** Support
**Created:** [December 23, 2021, 1:05am UTC](https://meta.discourse.org/t/macos-firefox-image-upload-error/212936 "2021-12-23T01:05:33Z")
**Posts on this page:** 1
**Showing post:** 16

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### Author: ![jimkleiber](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/jimkleiber/32/121814_2.png) [@jimkleiber](https://meta.discourse.org/u/jimkleiber)
#### Post date: [December 23, 2021, 2:06am UTC](https://meta.discourse.org/t/macos-firefox-image-upload-error/212936/16 "2021-12-23T02:06:19Z")

</div>

I found the culprit. I have the ClearURLs FF add-on installed and it has an option of

> Filters ETag headers from requests (See also [this article](https://en.wikipedia.org/wiki/HTTP_ETag#Tracking_using_ETags))

I disabled that setting and it now works, uploading the photo below from FF non-incognito window.

 ![Screen Shot 2021-12-22 at 9.05.10 PM](https://global.discourse-cdn.com/meta/original/3X/c/8/c820ec0c81aa44be7860320a16e3f35f8872cff2.png)

Thank you for helping me debug this!

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