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Memory leaks in browser JavaScript are subtle, often hard to reproduce, and can cause tabs to gradually consume gigabytes of RAM. Firefox's DevTools have excellent memory analysis tools. This guide shows how to find and fix common memory leak patterns using Firefox's Memory and Performance panels.
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The green checkmark is not the story. The story is what broke while everything stayed green. Dominique Siacci, CTO of GoodBarber, published a post-mortem on dev.
Many canvas apps pin every control to absolute X / Y coordinates at one design size, and look wrong at any other: a label overlapping a button on a laptop, dead space on a tablet, horizontal scrolling on a phone. Power Apps has had proper responsive layout tools — horizontal and vertical layout ...