" '' should be object " appears when starting firefox

[in-die-nibelungen]

Describe the bug

The page stays black when accessing https://rhysd.github.io/vim.wasm/ with firefox.
" '' should be object " appears on the bottom of the page as shown in the attached image.

Steps To Reproduce

1. Access https://rhysd.github.io/vim.wasm/ with firefox: will stay black (nothing be shown on the page).
2. Restart firefox, then you'll the screen as shown attached.

Expected behavior

The screen like vim will appear.

Actual behavior

The page stays black.

Screenshots/DevTools console (if possible)

Your environment

• OS: Windows 10
• Browser: Firefox
• Browser Version: 72.0.1 (64 bit)

[rhysd]

Let me confirm pre-condition. Did you enable javascript.options.shared_memory feature flag? By default Firefox does not enable it due to security reason as I described in README.md.

https://github.com/rhysd/vim.wasm#try-it-with-your-browser

[digg33]

Hi @rhysd, I am facing the very same issue. I have enabled the javascript.options.shared_memory feature as directed in the README. I've also tried this on a fresh profile and on new installations of Firefox on different machines. In all cases there is a black page. Additionally, Chrome/Chromium works fine for all machines.
I am fairly certain that this is not working at all in the latest versions of Firefox.

Since I am not particularly familiar with wasm, I am unable to determine the source of the problem myself; would it be possible for you to run some tests on Firefox yourself? Thanks.

[rhysd]

Thanks for the confirmation. Currently I have few resource for new project, but I'll try this (hopefully) on this weekend.

[levidavidmurray]

@digg33 The "should be an object" error is related to Vim Vixen, not vim.wasm

@rhysd Your top level document needs to be served with the following headers:

Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Embedder-Policy: require-corp

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer

[sheerun]

yes please :)