To disable breadcrumbs on the storefront:
- In the administration panel, go to Design > Layouts.
- Click on the tab where you want to disable breadcrumbs, e.g. Products. If the page is not in the location list, click on the Default location.
- Click the Activate/Deactivate Block icon of the Breadcrumbs block.
- Repeat steps 2-3 for all locations in that you want to disable breadcrumbs.
The block should become lighter.