www.bestbuy.com - Firefox is an unsupported browser

[kdashg]

URL: https://www.bestbuy.com/

Browser / Version: Firefox 110.0
Operating System: Windows 10
Tested Another Browser: Yes Chrome

Problem type: Something else
Description: On latest Firefox Nightly 110, but: We're sorry. Your browser is no longer supported by BestBuy.com. Please download the latest version of Chrome, Firefox, Microsoft Edge, 
Steps to Reproduce:
Loading their home page shows only:

We're sorry.
Your browser is no longer supported by BestBuy.com.
Please download the latest version of Chrome, Firefox, Microsoft Edge, 

Browser Configuration

• None

From webcompat.com with ❤️

[denschub]

Moving this directly into needsdiagnosis as a P1 - it's a high-traffic site, so let's make sure we dig into that and ship an intervention if needed. Also, see this Mozilla-internal Slack thread - we might have a direct way to contact them.

[denschub]

I did some testing, and this doesn't reproduce with the macOS user agent (maybe @wisniewskit can give this a quick test on Linux). Also, the relevant version number appears to be the one inside the parenthesis group, as this user agent

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/110.0

does not get blocked. Chrome's v110 user agent on Windows,

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

also does not get blocked - but it's notable that they don't even include the browser version inside the parenthesis. If I have a little bit of fun and build a frankenstein's UA string,

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:110.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

that also gets blocked. So the issue here is the version number in the parenthesis. Unfortunately, this block appears to be server-side, so it's hard to tell what's going on here exactly. But fortunately, this is easy to ship an intervention.

[denschub]

Filed a bug to track that intervention for the v110 cycle: https://bugzilla.mozilla.org/show_bug.cgi?id=1805967