Bug 1663836 Comment 10 Edit History

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### ESR Uplift Approval Request
* **If this is not a sec:{high,crit} bug, please state case for ESR consideration**: Web compatibility RFC 7540 "Any request or response that contains a character not permitted in a header field value MUST be treated as malformed (Section 8.1.2.6)." (https://datatracker.ietf.org/doc/html/rfc7540#section-10.3)

also see https://bugzilla.mozilla.org/show_bug.cgi?id=1731522
* **User impact if declined**: Non-standard-compliant Firefox behavior continues in ESR 91
* **Fix Landed on Version**: 93
* **Risk to taking this patch**: Low
* **Why is the change risky/not risky? (and alternatives if risky)**: - simple fix
- same behavior as chrome, safari and IE
- shouldn't cause any regressions
* **String or UUID changes made by this patch**: none
### ESR Uplift Approval Request
* **If this is not a sec:{high,crit} bug, please state case for ESR consideration**: Web compatibility RFC 7540 "Any request or response that contains a character not permitted in a header field value MUST be treated as malformed (Section 8.1.2.6)." (https://datatracker.ietf.org/doc/html/rfc7540#section-10.3)

* **User impact if declined**: Non-standard-compliant Firefox behavior continues in ESR 91
* **Fix Landed on Version**: 93
* **Risk to taking this patch**: Low
* **Why is the change risky/not risky? (and alternatives if risky)**: - simple fix
- same behavior as chrome, safari and IE
- shouldn't cause any regressions
* **String or UUID changes made by this patch**: none

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