User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:94.0) Gecko/20100101 Firefox/94.0

Steps to reproduce:

Cached a lots of files. Minimal nodejs project attached.

1. npm i
2. npm run generate
3. npm run serve
4. Open localhost:9090 - and open console, it should write the console, what is cached

Actual results:

5. Open debugger, Storage -> Cache -> localhost -> myCache
6. Only 50 element is showing

Expected results:

All the files are showing, or loading if I scroll to the bottom

The Bugbug bot thinks this bug should belong to the 'DevTools::Debugger' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

The severity field is not set for this bug.
:Honza, could you have a look please?

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Confirmed

Quick pointers, the issue comes in part from the getObjectsSize method defined in the storage actor:

    getObjectsSize(host, names) {
      return names.length;
    },

https://searchfox.org/mozilla-central/rev/fac07284a9a996ddf968ea53adaf25c2a8b7c520/devtools/server/actors/storage.js#268-270

This is the default implementation used by all actor types except for indexeddb. And this method is used in getStoreObjects... to check the number of items that should be returned (possibly? the storage actor's logic is hard to follow).

https://searchfox.org/mozilla-central/rev/fac07284a9a996ddf968ea53adaf25c2a8b7c520/devtools/server/actors/storage.js#416-442

I think the if (names) branch is only relevant for indexedDB and cache storages. However getObjectsSize doesn't really work in the same way for indexedDb and for cache. I think that we should only call getObjectsSize for indexedDB

This is purely a storage actor bug, so I will unblock the datatable meta.

https://hg.mozilla.org/mozilla-central/rev/37e53671309f

I was able to reproduce this bug using an affected Nightly build (97.0a1, 20211209155024), following the STR from comment 0.

The issue is verified as fixed on 97.0, under macOS 11 and Win 10 x64.