Scrolling over metric chart triggers timerange zoom in firefox

Summary

There is inconsistent behavior in how the zoom-scroll on our metric charts work on Firefox vs Chrome.

Steps to reproduce

  1. Open firefox
  2. Visit a project where Operations/Metrics is enabled and visible
  3. Scroll on page, allowing cursor to pass over a metric chart
  4. Observe the chart's timerange changing (even though the pointer event did not hover the chart at the start)

Example Project

What is the current bug behavior?

  • Chart zooms when scrolling over on firefox

What is the expected correct behavior?

  • Chart should not zoom when scrolling over on firefox (should match chrome behavior)

Relevant logs and/or screenshots

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Output of checks

This bug happens on GitLab.com

Results of GitLab environment info

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sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production)

Results of GitLab application Check

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sudo gitlab-rake gitlab:check SANITIZE=true)


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sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)


(we will only investigate if the tests are passing)

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)