# Discourse not loading on legacy browsers
**URL:** https://meta.discourse.org/t/discourse-not-loading-on-legacy-browsers/221412
**Category:** Bug
**Created:** [March 19, 2022, 7:13am UTC](https://meta.discourse.org/t/discourse-not-loading-on-legacy-browsers/221412 "2022-03-19T07:13:00Z")
**Posts on this page:** 1
**Showing post:** 63
### Author:  [@david](https://meta.discourse.org/u/david)
#### Post date: [April 4, 2022, 10:01am UTC](https://meta.discourse.org/t/discourse-not-loading-on-legacy-browsers/221412/63 "2022-04-04T10:01:39Z")
> [@sam](#):
>
> remove, browser\_update\_user\_agents we don’t want to feature detect with that anymore
IIRC this was essential for some browsers (IE \< 10?) because it’s impossible to access `` tags via JavaScript after doing the feature detection. I think @dan worked on this problem a few years back?
Note that there are two fallback ‘modes’ at the moment:
1. Serve the crawler view. No JS required. This is gated on `browser_update_user_agents`.
2. Serve the full app, feature detect, and fallback by moving `` content into ``. This is not based on user agent.
The problem here is that (2) is not working on mobile, because the server isn’t rendering any `` content. We need to fix that, without breaking (1) for mega-old browsers.
---
_[View the full topic](https://meta.discourse.org/t/discourse-not-loading-on-legacy-browsers/221412)._