Problem:
- click on https://de.wikipedia.org/wiki/Michael_Blume#/media/Datei:MichaelBlumeParlamentVersammlungEuroparat2017.jpg
- with Firefox
- your Screen should not be very big sized or zoomes out, otherwise: Zoom in.
- If it still doesn't (or, more accurately, does) work try https://commons.wikimedia.org/wiki/File:ABS-5232.0-AustralianNationalAccounts-FinancialAccounts-FinancialAccountsSummaryConsolidatedPublicNonfinancialCorporationsGeneralGovernmentNonfinancialPubli-NetTransactions-ConsolidatedSubsectorLevel2-TotalFinancialAssets-Liab-A3408795R.svg#/media/File:ABS-5232.0-AustralianNationalAccounts-FinancialAccounts-FinancialAccountsSummaryConsolidatedPublicNonfinancialCorporationsGeneralGovernmentNonfinancialPubli-NetTransactions-ConsolidatedSubsectorLevel2-TotalFinancialAssets-Liab-A3408795R.svg
Then you see, that there is a horizontal scroll bar at the bottom.
Instead I propose the following CSS:
.mw-mmv-image-links { word-break: break-all; }