1964888 - Large integers not rendered in JSON view

Status: RESOLVED FIXED

(DevTools :: JSON Viewer, defect, P2)

Description

[Richard Neumann]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0

Steps to reproduce:

• Create a file "test.json"
• Add the following content: "9999999999999999"
• Open file in Firefox 138.0.1 (64-Bit)

Actual results:

• See empty JSON view

Expected results:

• See number "9999999999999999" in JSON view

If you change the number to e.g. "9999999999999998" and reload the page, the correct number is shown in the JSON view.

In any case the source code view ([Ctrl]+[U]) always shows the correct number.

Comment 1

[Richard Neumann]

Attachment: Bildschirmaufzeichnung vom 2025-05-07 08-26-58.mp4

Comment 2

[BugBot [:suhaib / :marco]]

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

Comment 3

[Julian Descottes [:jdescottes]]

we should check the spec to see how JSON is supposed to handle big integers. But in any case, if there's an error we should at least display the raw data tab, and show a warning.

Comment 4

[Richard Neumann]

FWIW: The error does not occur when the integer is not the "bare" JSON object, but nested within a JSON object.

{ "n": 9999999999999999, "even_larger_n": 99999999999999999999999999999999999999999999999999999999 }

Comment 5

[Richard Neumann]

Attachment: Bildschirmfoto vom 2025-05-07 12-35-16.png

Comment 6

[Julian Descottes [:jdescottes]]

This is actually a regression, in ESR128 it worked fine. Potentially from Bug 1431808 ?

Comment 7

[Julian Descottes [:jdescottes]]

Confirmed this is a regression in Firefox 136.

Comment 8

[Julian Descottes [:jdescottes]]

Attachment: Bug 1964888 - [devtools] Fix JSON viewer rendering for JSON_NUMBER at the root

We should special case the JSON_NUMBER type in the JSON viewer panel component,
otherwise it will attempt to render it as a tree.

Comment 9

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/a68996b702e7
[devtools] Fix JSON viewer rendering for JSON_NUMBER at the root r=devtools-reviewers,ochameau

Comment 10

[Serban Stanca [:SerbanS]]

https://hg.mozilla.org/mozilla-central/rev/a68996b702e7

Comment 11

[BugBot [:suhaib / :marco]]

The patch landed in nightly and beta is affected.
:jdescottes, is this bug important enough to require an uplift?

• If yes, please nominate the patch for beta approval.
  • See https://wiki.mozilla.org/Release_Management/Requesting_an_Uplift for documentation on how to request an uplift.
• If no, please set status-firefox139 to wontfix.

For more information, please visit BugBot documentation.

Comment 12

[Julian Descottes [:jdescottes]]

Even though it's a regression I feel like it's still an edge case and can ride the trains.

Comment 13

[Nicolas Chevobbe [:nchevobbe]]

Note that we have the same issue in the Netmonitor response panel, see Bug 1965996