Facebook Container blocks RollupJS plugins from loading

[jasperf]

• Facebook Container Version: 2.3.1
• Operating System + Version: macOS Big Sure 11.6
• Firefox Version: Firefox Developer 93.0b8 (64-bit)
• Other installed Add-ons + Version + Enabled/Disabled-Status: amazon.com extension 1.3 true amazondotcom@search.mozilla.org Bing extension 1.3 true bing@search.mozilla.org DuckDuckGo extension 1.1 true ddg@search.mozilla.org DuckDuckGo Privacy Essentials extension 2021.9.2 true jid1-ZAdIEUB7XOzOJw@jetpack Facebook Container extension 2.3.1 true @contain-facebook Google extension 1.1 true google@search.mozilla.org Vue.js devtools extension 5.3.4 true {5caff8cc-3d2e-4110-a88a-003cc85b3858} Wikipedia (en) extension 1.1 true wikipedia@search.mozilla.org Français Language Pack locale 93.0buildid20210914185637 true langpack-fr@firefox.mozilla.org Nederlands (NL) Language Pack locale 93.0buildid20210919190049 true langpack-nl@firefox.mozilla.org

Actual behavior

It does not only block social media (Facebook/Instagram and Twitter modules' content) but it also blocks our RollupJS modules from loading in our Laravel VueJS App.

Expected behavior

See the rollup js modules load.. but they do not until I turn of the Firefox Facebook Container.

Steps to reproduce

1. turn on firefox facebook container
2. open our app
3. see rollupjs modules not loading

Notes

This app is coming out of beta soon but not yet. Would love to figure out how it can block these rollupjs plugins with js and vue from loading.

[jasperf]

Oddly enough on turning off and then on again it did allow loading of the rollup modules again. Only blocked items seem to be

10:30:26.219 Loading failed for the <script> with source “https://site.com/js/editor.js?id=78150386828f1a22c988”. editor:1663:1
10:30:26.468 [bugsnag] Loaded! editor.js:2:614734
10:30:26.667 Loading failed for the <script> with source “https://connect.facebook.net/en_US/sdk.js”. editor:1:1
10:30:26.667 Loading failed for the <script> with source “https://platform.instagram.com/en_US/embeds.js”. editor:1691:1
10:30:26.668 Loading failed for the <script> with source “https://platform.linkedin.com/in.js”. editor:1693:1

And that may be DuckDuck Go.

[jasperf]

Well, it seems to be related to a possible link preload issue, not Facebook Container or DuckDuck Go in this rollupJS modules case. Will close the issue for now.