1929443 - Jira button animations cause sustained high Firefox CPU usage

Status: NEW

(Core :: Performance, defect)

Description

[Sean Rose [:srose]]

Attachment: Jira button animation.mov

​​### Basic information

Steps to Reproduce:

• Visit a Jira instance like our https://mozilla-hub.atlassian.net/jira/ where Jira is animating certain buttons to draw attention to them (as shown in the attached video).

Expected Results:

• Firefox renders Jira's button animation without sustained high CPU usage.

Actual Results:

• The button animation causes sustained high Firefox CPU usage (about:performance says my Jira tabs with such button animations are constantly using ~20% CPU each).
• I confirmed this by overriding the CSS for the button to hide it, which caused the CPU usage for that tab to drop down to a more modest level.

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Performance recording (profile)

Profile URL: https://share.firefox.dev/4ffTsrr

System configuration:

OS version: macOS 14.7
GPU model: Apple M1 Max
Number of cores: 24
Amount of memory (RAM): 64 GB

More information

Please consider attaching the following information after filing this bug, if relevant:

• Screenshot / screen recording
• Anonymized about:memory dump, for issues with memory usage
• Troubleshooting information: Go to about:support, click "Copy text to clipboard", paste it to a file, save it, and attach the file here.

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Thanks so much for your help.

Comment 1

[Sean Rose [:srose]]

Places where I've seen these Jira button animations so far:

• The "Add" button on a Jira issue page. After clicking the animated "Add" button and dismissing Jira's prompt explaining how the "Add" button UI had been changed it stopped animating the "Add" buttons to highlight them.
• On a Jira board, the three-dots menu for the first Jira issue shown on the board (as shown in the attached video).