This is caused by https://bugzilla.mozilla.org/show_bug.cgi?id=1570700#c10.
The resource:// URLs in the amazon OpenSearch descriptions we ship should be replaced by data: URIs, i.e.:
resource://search-plugins/images/amazon.ico
replaced by
data:image/png;base64,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
This is caused by https:/ /bugzilla. mozilla. org/show_ bug.cgi? id=1570700# c10.
The resource:// URLs in the amazon OpenSearch descriptions we ship should be replaced by data: URIs, i.e.:
resource: //search- plugins/ images/ amazon. ico
replaced by
data: image/png; base64, iVBORw0KGgoAAAA NSUhEUgAAABAAAA AQCAYAAAAf8/ 9hAAAABmJLR0QA/ wD/AP+gvaeTAAAA CXBIWXMAAC4jAAA uIwF4pT92AAABaE lEQVQ4y6VTPUvDU BQ9kWRSRHCqND9A cWicXJxCtjqopFt XOwod+g/ chWQtThYXG8FV0E 0pmUoFk8U6NMW6N KRdWuE4pIbmQyt6 4A7v4553zr3vCgB AkvgDBEEQhKxk13 VRr9fx0u0CAPaLR ZTL5WwWJmDbNkVJ SkWtVmMWUgTHlQp FSaKqaXQcJ1rnZT mTIGWh3+ /D8zz4vo8gCHDRa MCyLADAdDJZbMFx HBYUJdPGryzopRJ FSWJBUeh5Hg3T/ JFgKanoS66u68jl cmi329HZaDRabGF evqppMQuGaX5jYd yLtTEvy1HlDdOkX ipR1TQGQUC652Sr GkZEcLNJDp+ 5EHcHYeLTGXmJOY LebbjRqsbUpDDuk d1m+NjVeuIfvFrA 42FYmLU9QD6KF+ vtHhhcA7tNQFoFh h1g6wTxj/ RuA53T8GISy5vAj gFsqMDHrBviCjKH Cb4DDB6AqT9TtB0 mZk3kf8f5E5FB5x iRl94rAAAAAElFT kSuQmCC