1956602 - [link preview] `RangeError: TextDecoder constructor: The given encoding '"utf-8"'` is not supported on some pages

Status: NEW

(Core :: Machine Learning, defect)

Description

[Paul Adenot (:padenot)]

STR:

• Open https://firefox-source-docs.mozilla.org/contributing/editor.html w/ link preview enabled (about:config -> browser.ml.linkPreview.enabled -> true)
• Take any link, press alt to trigger the preview

Expected:

• The preview appears

Actual:

• No preview appears. The console says:

RangeError: TextDecoder constructor: The given encoding '"utf-8"'`
onStopRequest resource:///actors/LinkPreviewChild.sys.mjs:116

This is https://searchfox.org/mozilla-central/source/browser/components/genai/LinkPreviewChild.sys.mjs#116. When breaking in the debugger, the value of charset is '"utf-8"', there's too many quotes in this string.

The feature works well on e.g. Wikipedia, otherwise.