So that cryptic script ends up making `script.src` setter, through a dark magic, to set `type=text/plain`. A plain text script element is not going to fire any load/error events, thus breaking wp-rocket's expectation. The recommended intervention is to ignore all the details and * override the user agent string to not include Firefox. * or, set `navigator.vendor` to an empty string to make wp-rocket not enter Firefox specific branch.
Bug 2018543 Comment 11 Edit History
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So that cryptic script ends up making `script.src` setter, through a dark magic, to set `type=text/plain`. A plain text script element is not going to fire any load/error events, thus breaking wp-rocket's expectation. The recommended intervention is to ignore all the details and override the user agent string to not include Firefox, to make wp-rocket not enter Firefox specific branch.