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Re:Let's guess what Google requires in 14 days or they kill ... by smnthermes on Wednesday May 13, 2020 @07:43PM (#23173237)
> The XUL extension mechanism was permanent technical debt loaded onto the browser because of how it exposed features, basically welding things directly onto the browser's guts, which is a nightmare to maintain.

There is no evidence for this at all. Extensions can't modify the rendering engine.

Re:Let's guess what Google requires in 14 days or they kill ... by roca on Thursday May 14, 2020 @12:10AM (#23175178)
"guts" meant the XUL implementing the Firefox UI. tialaramex is absolutely right about that, extensions had total access to that XUL/JS state, which is why changes to the Firefox UI inevitably broke extensions.