Fonts do not load in firefox when docs are accesed from a file url

[jendrikw]

When using cargo doc --open, the docs are generated and placed in target/doc and the url file:///path/to/project/target/doc/cratename/index.html is opened in the default browser.
Due to CORS restrictions, Firefox does not allow pages from file urls to access fonts further up in the directory tree, so the fonts in target/docs are not loaded.

The docs then look like this:

I found some an archived artivel on MDN describing the policy: https://developer.mozilla.org/en-US/docs/Archive/Misc_top_level/Same-origin_policy_for_file:_URIs. When setting the key security.fileuri.strict_origin_policy to false, the fonts get loaded as expected.

A solution would have to change the directory structure of the output, or move the index.html one level up. I am not sure how documentation of workspaces is handled.

Debug info:
cargo 1.29.0-nightly (af9e40c 2018-07-05)
Firefox 61.0.1

[alexcrichton]

Oh dear! cc @rust-lang/docs, y'all may be interested in this issue

[luser]

I filed this in the Rust repo a while back: rust-lang/rust#34681

[ehuss]

I believe this is no longer an issue as of firefox 68.0.2. Can anyone confirm if it is still a problem or should this be closed?

[luser]

This seems to work fine now in Firefox 69.

[luser]

For reference it looks like this behavior was changed in Firefox in https://bugzilla.mozilla.org/show_bug.cgi?id=1565942, which landed in Firefox 69 and was backported to 68.0.2.

[ehuss]

Thanks @luser.

I'll close this for now. If there are any other problems, please file a new issue or comment on #4966 which would be the solution for most of these kinds of problems.