Panorama Photo

When I woke up on Monday August 14th, I discovered that something abnormal happened on the river Scheldt as a big container ship throwed out her anker here in the bend of Terneuzen - what they never do - and a cruise liner with destination Antwerp all of the sudden turned 180° to go back to sea.
A check of the MarineTraffic site revealed that the mega container ship CSCL Jupiter (366 m long, 51 m wide, 155000 tonnes) had a peculiar position in the Bend of Bath as if her nose almost touched the dike. A quick check of the news confirmed that the ship was stranded and the river closed for traffic. So I changed my plans for the day and went to Baalhoek which is the other side of the river and Southwest of Bath. I would go to the Baalhoek viewpoint anyway to complete my documentation of the Scheldt estuary but this was a real opportunity and... the weather was fine.
Can you find the seals on Walsoorden plate?

Canon G1Xmark2, 26 pics, 62.5 mm + small extra tele making 154 mm KB, iso 125, f 3.9, 1/1600, tripod, stitched with Hugin, 57% of the height retained.

I discovered something annoying. When I look to my pano with Safari, it has the same quality as the file I sent to this site, however with Firefox, I see much lower quality. How is this possible????
I checked my other panos and The Walsoorden pano remains equal in both browsers. However my pano: View to the east from Waterfront shows the same issue: lower quality with Firefox and equal quality with Safari compared to the file sent. This is very weird. Maybe Firefox isn't able to show the resolution of wide panos? This one after downsizing is 24242x500 px.