''ukropzik [[#question-1280303|said]]'' <blockquote> I can see it with other browsers, but not with Firefox. Why so? https://portal.tlc-mobile.com/en/cabinet.html </blockquote> Hello ukropzik, Well, I just opened that page and looking at those bubbles almost made me seasick ..... (kidding). Let's Try Firefox in Safe Mode to see if maybe one of your extensions (or something else) is causing this : If Firefox is not running : Hold down the Shift key when starting Firefox. If Firefox is running : 3-bar menu => ' ? ' (at the bottom of the dropdown) => 'Restart with Add-ons disabled'. Then OK the restart. A small dialog should appear. Click 'Start in Safe Mode' ( not 'Refresh' !) See : https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode And : https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems Any difference ?

The 'flying-bubbles' are created by this JavaScript file and are drawn on canvas. *https://portal.tlc-mobile.com/anim2/index.js You can check the Web Console for possible related messages. *"3-bar" menu button or Tools -> Web Developer *https://developer.mozilla.org/en-US/Tools/Web_Console