Fragment of about:memory

gistfile1.txt

│   ├───1,269,208 B (00.16%) -- @testpilot-addon
│   │   ├──1,102,472 B (00.14%) -- window-objects/top(moz-extension://8358893d-3bff-784c-9e3b-d2dd235a93c2/_generated_background_page.html, id=91)
│   │   │  ├────701,496 B (00.09%) -- js-zone(0x162f0c000)
│   │   │  │    ├──362,432 B (00.05%) ── unused-gc-things
│   │   │  │    ├──127,904 B (00.02%) -- shapes
│   │   │  │    │  ├──112,704 B (00.01%) -- gc-heap
│   │   │  │    │  │  ├───87,064 B (00.01%) ── tree
│   │   │  │    │  │  ├───21,832 B (00.00%) ── dict
│   │   │  │    │  │  └────3,808 B (00.00%) ── base
│   │   │  │    │  └───15,200 B (00.00%) -- malloc-heap
│   │   │  │    │      ├───6,912 B (00.00%) ── dict-tables
│   │   │  │    │      ├───6,240 B (00.00%) ── tree-kids
│   │   │  │    │      └───2,048 B (00.00%) ── tree-tables
│   │   │  │    ├───90,528 B (00.01%) -- strings
│   │   │  │    │   ├──74,120 B (00.01%) -- string(<non-notable strings>)
│   │   │  │    │   │  ├──51,936 B (00.01%) -- malloc-heap
│   │   │  │    │   │  │  ├──39,936 B (00.01%) ── latin1
│   │   │  │    │   │  │  └──12,000 B (00.00%) ── two-byte
│   │   │  │    │   │  └──22,184 B (00.00%) -- gc-heap
│   │   │  │    │   │     ├──21,824 B (00.00%) ── latin1
│   │   │  │    │   │     └─────360 B (00.00%) ── two-byte
│   │   │  │    │   └──16,408 B (00.00%) -- string(length=7970, copies=1, "<h3>Test Pilot No More 404s Graduation Report</h3> <p>Last winter, some folks from the Test Pilot team got together with some folks from the <a href="https://archive.org/" target="_blank">Internet Archive</a> and hatched a plan. On the Test Pilot side of things, we were busy building our platform and getting experiments out into the wild. Meanwhile, the team at the Internet Archive was prototyping an add-on to help users avoid dead ends on the Web by checking if they had archived versions of sites available in the <a href="https://archive.org/web/" target="_blank">Wayback Machine</a> for users who encountered 404 errors.</p> <p>We launched the No More 404s experiment with a few goals in mind. We know from user research that 404 pages are a persistent nuisance on the Web, and a No More 404s add-on seemed like a really sweet utility to help steer users toward their intended content. Additionally, the Test Pilot team wanted to find out how a partner organization like the Internet Archive could help bring testab" (truncated))
│   │   │  │    │      ├──16,384 B (00.00%) ── malloc-heap/two-byte
│   │   │  │    │      └──────24 B (00.00%) ── gc-heap/two-byte
│   │   │  │    ├───57,344 B (00.01%) ── type-pool
│   │   │  │    ├───19,056 B (00.00%) -- sundries
│   │   │  │    │   ├──10,376 B (00.00%) ── gc-heap
│   │   │  │    │   └───8,680 B (00.00%) ── malloc-heap
│   │   │  │    ├───12,288 B (00.00%) ── shape-tables
│   │   │  │    ├───12,000 B (00.00%) ── object-groups/gc-heap
│   │   │  │    ├───11,752 B (00.00%) ── gc-heap-arena-admin
│   │   │  │    └────8,192 B (00.00%) ── unique-id-map
│   │   │  └────400,976 B (00.05%) -- active/window(moz-extension://8358893d-3bff-784c-9e3b-d2dd235a93c2/_generated_background_page.html)
│   │   │       ├──323,408 B (00.04%) -- js-compartment(moz-extension://8358893d-3bff-784c-9e3b-d2dd235a93c2/_generated_background_page.html)