Hi This does not sound like an issue about Firefox, but is something that the Chrome support team should be able to help you with.

''<p>Giannakius 2 [[#question-1450383|said]]</p>'' <blockquote>I've recently uploaded a custom-made extension to the Chrome Web Store for my personal use and for a few specific users. It's currently awaiting review. </blockquote> You mention the Chrome Web Store which is for Extensions for the Google Chrome web browser as Firefox does not support Chrome extensions. ''<p>Giannakius 2 [[#question-1450383|said]]</p>'' <blockquote> However, I'm encountering an issue where I cannot download and use the extension myself. When attempting to download, I receive the message "Download failed. Please check your connection." Although I can see the extension listed on the store (since it's mine), I'm unable to use it personally. Could you please assist me with resolving this issue? </blockquote> Yet your image shows it is a Firefox extension on the addons.mozilla.org site?. If you are actually referring to addons.mozilla.org and not the Chrome Web Store, then perhaps you may get better help at https://discourse.mozilla.org/c/add-ons/35