I already made a thread over in the general steam community forum, but I feel like this is a better place for the issue. While this is not a direct bug with the steam beta client - there is no place (that I have found) to be able to report issues with the web backend team responsible for the steam community / steam market.

ISSUE
Any Firefox web browser (AND the steam mobile app) is currently unable to list any item to the steam community market since ~19 Feb 2025 (~9 days at the time this post was created)

OS
Any Firefox web browser (AND the steam mobile app)

STEPS

- Login to Steam via a Firefox based browser (or the steam mobile app)
- Navigate to the steam community market
- Attempt to list an item from your inventory

RESULTS
the error "There was a problem listing your item. Refresh the page and try again." appears when trying to list an item (only on impacted browsers)

EXPECTED
The item should be listed to the steam community market

== ADDITIONAL DETAILS ==
Steam user TheOddsBodkins has done some great root cause analysis and found the problem stems from a missing capita "K" in the following javascript library call


(The production version is missing a capital K)

See their post about it here - https://psteamcommunity.yuanyoumao.com/groups/SteamClientBeta/discussions/0/599645206077305086/

You can workaround the issue by entering this javascript directly into the firefox browsers javascript console (or via userscript) to bypass the issue (alternatively you can use a chrome based browser [including the steam desktop app] to bypass the issue also) but in most cases you need to repeat this workaround each time you visit the steam market.

Hope enough details have been shared here so this issue can be fixed - us Firefox and steam mobile users have been suffering this issue for days now, my steam support ticket (Ticket: HT-8T5C-KN5T-KBX9) was not successful at escalating this to the appropriate team within Valve.