I was able to reproduce the bug using an affected Nightly build (2020-01-19), and by following the steps from comment 20. I can confirm that on latest Nightly 75.0a1 the memory usage stays within 200-400MB range in `about:memory`. Tested on Win 10 x64, macOS 10.13 and Ubuntu 18.04 x64. I'll not remove the qe-verify+ flag for now, in case the patch gets uplifted to Beta.
Bug 1610193 Comment 24 Edit History
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I was able to reproduce the bug using an affected Nightly build (2020-01-19), and by following the steps from comment 20. I can confirm that on latest Nightly 75.0a1 the memory usage stays within 200-400MB range in `about:memory`. Tested on Win 10 x64, macOS 10.11 and Ubuntu 18.04 x64. I'll not remove the qe-verify+ flag for now, in case the patch gets uplifted to Beta.