Sprint Burndown gadget is not fully displayed on Firefox and is cut off not showing results

Issue Summary

Sprint Burndown gadget is not fully displayed and is cut off not showing results. This causes for results not to show and the purpose of the gadget becomes useless. This happens in Firefox but doesn't on Chrome.

Environment

Jira 8.0.0
Mozilla Firefox

Steps to Reproduce

1. Create a new dashboard (or use an existing one)
2. Add a new gadget
3. Load all gadgets
4. Locate "Sprint Burndown Gadget" and click "Add gadget"
5. Pick any board from the list and click "save"

Expected Results

Gadget shows normally and all data can be visible

Actual Results

Half of the gadget cannot be seen and data cannot be seen

Workaround

Use Chrome instead for the time being as there's no applicable workaround for Firefox at this point in time.