I've reproduced this bug using the steps from comment 0, on an affected Nightly build (90.0a1 Build ID 20210430214504). The last access date and data associated for the test page entries are now displayed in `about:cache`. Tested with Beta 94.0b2, under macOS 11, Ubuntu 18.04 x64 and Win 11 x64.
Bug 1708673 Comment 16 Edit History
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I've reproduced this bug using the steps from comment 0, on an affected Nightly build (90.0a1 Build ID 20210430214504). The last access date and data associated for the test page entries are now displayed in `about:cache`. Tested with Beta 94.0b2, under macOS 11, Ubuntu 18.04 x64 and Win 11 x64.