docs.google.com - see bug description

[andreasbovens]

URL: https://docs.google.com/
Browser / Version: Firefox 55.0
Operating System: Windows 10
Problem type: Something else - I'll add details below

Steps to Reproduce

1. Navigate to: https://docs.google.com/
2. Open any document

Expected Behavior:
No warning message shown

Actual Behavior:
"Some fonts could not be loaded. Try reloading." warning is shown.

From webcompat.com with ❤️

[adamopenweb]

Thanks @andreasbovens. Although this is closed as fixed, it looks like it's the same bug:
https://bugzilla.mozilla.org/show_bug.cgi?id=1331737

[wisniewskit]

This is related to OTL validation on Firefox nightly builds (as was the issue in bug 1331737). You can see a bunch of logging in the console specifying what the problems are:

downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Alegreya--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/alegreya/v8/PKys784xFWEyulaVqf-GGPesZW2xOQ-xsNqO47m55DA.woff2 (unknown)
downloadable font: Layout: Failed to parse script table 0 (font-family: "Alegreya--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/alegreya/v8/PKys784xFWEyulaVqf-GGPesZW2xOQ-xsNqO47m55DA.woff2 (unknown)
downloadable font: GSUB: Failed to parse script list table (font-family: "Alegreya--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/alegreya/v8/PKys784xFWEyulaVqf-GGPesZW2xOQ-xsNqO47m55DA.woff2 (unknown)
downloadable font: GSUB: Failed to parse table (font-family: "Alegreya--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/alegreya/v8/PKys784xFWEyulaVqf-GGPesZW2xOQ-xsNqO47m55DA.woff2 (unknown)
downloadable font: rejected by sanitizer (font-family: "Alegreya--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/alegreya/v8/PKys784xFWEyulaVqf-GGPesZW2xOQ-xsNqO47m55DA.woff2 (unknown)
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Amatic SC--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/amaticsc/v9/bkQv2tfMXhELW4NhNM9E6VtXRa8TVwTICgirnJhmVJw.woff2 (unknown)
downloadable font: Layout: Failed to parse script table 0 (font-family: "Amatic SC--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/amaticsc/v9/bkQv2tfMXhELW4NhNM9E6VtXRa8TVwTICgirnJhmVJw.woff2 (unknown)
downloadable font: GSUB: Failed to parse script list table (font-family: "Amatic SC--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/amaticsc/v9/bkQv2tfMXhELW4NhNM9E6VtXRa8TVwTICgirnJhmVJw.woff2 (unknown)
downloadable font: GSUB: Failed to parse table (font-family: "Amatic SC--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/amaticsc/v9/bkQv2tfMXhELW4NhNM9E6VtXRa8TVwTICgirnJhmVJw.woff2 (unknown)
downloadable font: rejected by sanitizer (font-family: "Amatic SC--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/amaticsc/v9/bkQv2tfMXhELW4NhNM9E6VtXRa8TVwTICgirnJhmVJw.woff2 (unknown)
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Bree Serif--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/breeserif/v6/gYNCJGQplB5I_EB1As0Y3fk_vArhqVIZ0nv9q090hN8.woff2 (unknown)
downloadable font: Layout: Failed to parse script table 0 (font-family: "Bree Serif--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/breeserif/v6/gYNCJGQplB5I_EB1As0Y3fk_vArhqVIZ0nv9q090hN8.woff2 (unknown)
downloadable font: GSUB: Failed to parse script list table (font-family: "Bree Serif--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/breeserif/v6/gYNCJGQplB5I_EB1As0Y3fk_vArhqVIZ0nv9q090hN8.woff2 (unknown)
downloadable font: GSUB: Failed to parse table (font-family: "Bree Serif--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/breeserif/v6/gYNCJGQplB5I_EB1As0Y3fk_vArhqVIZ0nv9q090hN8.woff2 (unknown)
downloadable font: rejected by sanitizer (font-family: "Bree Serif--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/breeserif/v6/gYNCJGQplB5I_EB1As0Y3fk_vArhqVIZ0nv9q090hN8.woff2 (unknown)
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Roboto--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/roboto/v16/qilJ1yqu3_B3hXG44PJ9Ng.woff2 (unknown)
downloadable font: Layout: Failed to parse script table 0 (font-family: "Roboto--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/roboto/v16/qilJ1yqu3_B3hXG44PJ9Ng.woff2 (unknown)
downloadable font: GSUB: Failed to parse script list table (font-family: "Roboto--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/roboto/v16/qilJ1yqu3_B3hXG44PJ9Ng.woff2 (unknown)
downloadable font: GSUB: Failed to parse table (font-family: "Roboto--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/roboto/v16/qilJ1yqu3_B3hXG44PJ9Ng.woff2 (unknown)
downloadable font: rejected by sanitizer (font-family: "Roboto--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/roboto/v16/qilJ1yqu3_B3hXG44PJ9Ng.woff2 (unknown)
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Varela Round--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/varelaround/v8/APH4jr0uSos5wiut5cpjrkWnNVpw0CtxFlw7ZW7Wg4I.woff2 (unknown)
downloadable font: Layout: Failed to parse script table 0 (font-family: "Varela Round--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/varelaround/v8/APH4jr0uSos5wiut5cpjrkWnNVpw0CtxFlw7ZW7Wg4I.woff2 (unknown)
downloadable font: GSUB: Failed to parse script list table (font-family: "Varela Round--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/varelaround/v8/APH4jr0uSos5wiut5cpjrkWnNVpw0CtxFlw7ZW7Wg4I.woff2 (unknown)
downloadable font: GSUB: Failed to parse table (font-family: "Varela Round--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/varelaround/v8/APH4jr0uSos5wiut5cpjrkWnNVpw0CtxFlw7ZW7Wg4I.woff2 (unknown)
downloadable font: rejected by sanitizer (font-family: "Varela Round--Menu" style:normal weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/s/varelaround/v8/APH4jr0uSos5wiut5cpjrkWnNVpw0CtxFlw7ZW7Wg4I.woff2 (unknown)
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Bree Serif" style:normal weight:normal stretch:normal src index:2) source: https://fonts.gstatic.com/s/breeserif/v6/LQ7WLTaITDg4OSRuOZCps_k_vArhqVIZ0nv9q090hN8.woff2 (unknown)
downloadable font: Layout: Failed to parse script table 0 (font-family: "Bree Serif" style:normal weight:normal stretch:normal src index:2) source: https://fonts.gstatic.com/s/breeserif/v6/LQ7WLTaITDg4OSRuOZCps_k_vArhqVIZ0nv9q090hN8.woff2 (unknown)
downloadable font: GSUB: Failed to parse script list table (font-family: "Bree Serif" style:normal weight:normal stretch:normal src index:2) source: https://fonts.gstatic.com/s/breeserif/v6/LQ7WLTaITDg4OSRuOZCps_k_vArhqVIZ0nv9q090hN8.woff2 (unknown)
downloadable font: GSUB: Failed to parse table (font-family: "Bree Serif" style:normal weight:normal stretch:normal src index:2) source: https://fonts.gstatic.com/s/breeserif/v6/LQ7WLTaITDg4OSRuOZCps_k_vArhqVIZ0nv9q090hN8.woff2 (unknown)
downloadable font: rejected by sanitizer (font-family: "Bree Serif" style:normal weight:normal stretch:normal src index:2) source: https://fonts.gstatic.com/s/breeserif/v6/LQ7WLTaITDg4OSRuOZCps_k_vArhqVIZ0nv9q090hN8.woff2 (unknown)
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Varela Round" style:normal weight:normal stretch:normal src index:2) source: https://fonts.gstatic.com/s/varelaround/v8/APH4jr0uSos5wiut5cpjrugdm0LZdjqr5-oayXSOefg.woff2 (unknown)
downloadable font: Layout: Failed to parse script table 0 (font-family: "Varela Round" style:normal weight:normal stretch:normal src index:2) source: https://fonts.gstatic.com/s/varelaround/v8/APH4jr0uSos5wiut5cpjrugdm0LZdjqr5-oayXSOefg.woff2 (unknown)
downloadable font: GSUB: Failed to parse script list table (font-family: "Varela Round" style:normal weight:normal stretch:normal src index:2) source: https://fonts.gstatic.com/s/varelaround/v8/APH4jr0uSos5wiut5cpjrugdm0LZdjqr5-oayXSOefg.woff2 (unknown)
downloadable font: GSUB: Failed to parse table (font-family: "Varela Round" style:normal weight:normal stretch:normal src index:2) source: https://fonts.gstatic.com/s/varelaround/v8/APH4jr0uSos5wiut5cpjrugdm0LZdjqr5-oayXSOefg.woff2 (unknown)
downloadable font: rejected by sanitizer (font-family: "Varela Round" style:normal weight:normal stretch:normal src index:2) source: https://fonts.gstatic.com/s/varelaround/v8/APH4jr0uSos5wiut5cpjrugdm0LZdjqr5-oayXSOefg.woff2

They're all from Google Fonts, so I'm marking this as a dupe of bug 1331797.

[wisniewskit]

The fonts involved are now working for me in today's nightly, presumably because the fonts have been fixed.