Embedded app loads OK on Chrome, but not on Firefox or Safari

[fairknowe]

Description

Embedded app loads OK on Chrome, but not on Firefox or Safari. See forum post for picture.

Steps to Reproduce

1. bundle init
2. bundle add shopify-cli
3. bundle add dotenv-rails
4. shopify login
5. shopify app create rails (answering yes to public app)
6. shopify app serve
7. install app on Chrome, confirm install. Uninstall and repeat for Firefox & Safari

Expected behavior:

The app admin iframe should load with list of products in each browser

Actual behavior:

The Chrome browser performs as expected. With Firefox and Safari the installation process hangs after leaving the admin page and never returns.

If I refresh the Firefox/Safari page, the app admin iframe loads but the resulting text is the same, and the products do not load.

In all cases the app installs, but views/home/index.html.erb doesn't seem to load completely on Firefox & Safari.

Reproduces how often:

Every time

Browsers

Chrome (Version 100.0.4896.88 (Official Build) (x86_64)), Firefox (99.0.1 (64-bit)), Safari (Version 15.4 (15613.1.17.1.13, 15613)

Gem versions

Using ruby-3.1.2
Gems:
Rails 7.0.2.3
shopify_api (10.0.2)
shopify_app (19.0.1)
shopify-cli (2.15.6)

Additional Information

My naive troubleshooting seems to point to the Firefox & Safari browser installs stopping at line 13 in views/home/index.html.erb. In other words, I don't think the 'await import("lib/shopify_app")' is returning.

Security

• I have redacted any private information from my logs or code snippets.

[fairknowe]

I've added a repo with a Dockerfile and instructions that creates a simple app to illustrate this issue... https://github.com/fairknowe/Issue1417

[alfredoshopcreatify]

I'm seeing the same issue in Rails 7 with importmaps.

[nelsonwittwer]

Thanks for reporting this! We recently merged in #1506 to address this issue with importmaps affecting Safari/Firefox. We are targeting a release at the end of the month, feel free to point at the main branch of this repo if you need a fix implemented sooner than that. Thanks!