Hi, Our website has slide bar to select values. When we click on the slide bar lightly, the mouse click event does not happen completely. Because of that the sliding bar moves here and there automatically along with cursor movement. But at the same time when we click the mouse firmly, the issue is not occurs. The slide bar value is fixed where we click the mouse. Moreover the issue is happening only in Firefox 45(latest). Whereas other browsers are working fine. Please refer the below URL for your reference. https://www.provident.cz/online-kalkulacka Reproducing steps: -------------------------- 1. Once you browse the page, select the slide bar under the 'Výše půjčky' 2. You can see the values will get changed while you drag the bar. 3. Click at particular value say 28000 Kc slightly. 4. You can see that the sliding bar moves here and there with click less and moves with cursor movement and you cannot click on the sliding bar at particular point. 5. If you click firmly on the sliding bar, then you can set the value at particular point. Please compare the page with other browsers as well to understand the issue. Thanks, Thamizh