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If i try to change zoom level of my tab which open in another window it affects the settings of other open windows also.

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Hello,

I updated to my latest firefox Quantum update , and i found this issue , which is :-

I had two opened windows of firefox , so in first one it was at 30% zoom and other was normal at default settings , i wanted to zoom in and changed it to 110% , and i was surprised simultaneously the other window's 30% also changed to 110% , this happened just a single time to be honest , it 's not happening again. But still i thought it would be right to report this.

Hello, I updated to my latest firefox Quantum update , and i found this issue , which is :- I had two opened windows of firefox , so in first one it was at 30% zoom and other was normal at default settings , i wanted to zoom in and changed it to 110% , and i was surprised simultaneously the other window's 30% also changed to 110% , this happened just a single time to be honest , it 's not happening again. But still i thought it would be right to report this.

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Thanks. Proper place should be here : https://bugzilla.mozilla.org/

Your Video Card Drivers are having a little issue I think. They are from driverDate: 11-10-2016 Please update them from here : https://downloadcenter.intel.com/product/86210/Intel-HD-Graphics-5500 These are from 6/23/2017 Please always update your card and save the latest driver somewhere.

You know that the final release for Firefox 57 Quantum is Nov 14th. Issues running betas.

Please let us know if this solved your issue or if need further assistance.

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By default, Firefox synchronizes zoom changes to tabs showing pages from the same site (the zoom level may change when you activate the tab). If it was a different site, or if you changed that setting so zoom is tab-based rather than site-based, then the behavior you described definitely doesn't make any sense. Maybe some kind of beta glitch?

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See also these prefs on the about:config page.

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.