Affected versions

• Firefox 83.0b8
• Firefox 84.0a1

Affected platforms

• Windows 10
• mac 10.15
• Ubuntu 20.04

Steps to reproduce

1. Launch Firefox
2. Access about:telemetry
3. Select "Environment Data" for example and search for anything that will give no results
4. Click again on "Environment Data"

Expected result

• The page will reload and the search will be cleared

Actual result

• The page is loaded over the "Sorry! There are no results" message

Regression range

• I will see for a regression.

Additional notes

• The issue can be seen in the following attachment

Suggested severity

• S3-S4

It seems somewhat unlikely this is a bug in DOM.

Tried searching for a regression range on Windows 10x64 here but there are two behaviors:

First scenario: The search works as expected on good build on which I cannot reproduce the issue and does not work at all on bad builds:
Last good revision: ab2d700fda2b4934d24227216972dce9fac19b74 (2017-08-30)
First bad revision: 13d241d08912be31884f9d0d0e805b25343d6c0a (2017-08-31)
Pushlog:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=ab2d700fda2b4934d24227216972dce9fac19b74&tochange=13d241d08912be31884f9d0d0e805b25343d6c0a

Second scenario: On Firefox 57.0a1 (20170906220306) the search does not work and on Firefox 57.0a1 (20170907220212) the search works again and the issue can be reproduced.
Pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=93dd2e456c0ecca00fb4d28744e88078a77deaf7&tochange=b4c1ad9565ee9d00d96501c4a83083daf25c1413

Also on Firefox 57.0a1 (20170907220212) the Sorry! There are no results in Environment Data for “string” message is displayed.

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

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Mind If I tackle this one?

By all means, do! When you submit your first patch, the bug will be assigned.