Bugzilla

(In reply to Ardelean Oana from comment #5)
> I was able to reproduce this issue on Firefox 98(20220304153049) on Win10 64-bit using the steps from the Description. The issue is partly resolved(zooming with Ctrl+Mouse Wheel behaves as expected), however, keyboard scrolling is still faulty on Firefox 100.0b7(20220417185951) and Nightly 101.0a1(20220419093010). It will not go above the maximum zoom level before the tweaks in `about:config`.(In newer version of Firefox the default zoom value is `500`; I changed it to `700`, restarted the browser and tried to zoom in without success). Also, if one zooms in using Ctrl+Mouse Wheel above a `500` value, and tries to zoom out using the keyboard, the value will downgrade directly to `400`. 
>  [I'm leaving a recording of the keyboard scroll on Fx 100 here.](https://drive.google.com/file/d/1PnKX9yn79HaeOOJ9p-XaMuEP5dZg526m/view?usp=sharing)
> On macOS 11 and Ubuntu 20 the same behaviour is enconteured - mouse zooming is working as expected, but keyboard zooming is not.  
> Should I re-open this bug or fill a new one strictly related to the keybooard zoom issue? 
> Thank you in advance.

You would have to also change `toolkit.zoomManager.zoomValues`, which is a comma separated list of zoom values (divided by 100, so `.3` is 30%, and `5` is 500% - you'd want to add values to the end to confirm zooming to 700 or w/e works.

(In reply to Ardelean Oana from comment #5)
> I was able to reproduce this issue on Firefox 98(20220304153049) on Win10 64-bit using the steps from the Description. The issue is partly resolved(zooming with Ctrl+Mouse Wheel behaves as expected), however, keyboard scrolling is still faulty on Firefox 100.0b7(20220417185951) and Nightly 101.0a1(20220419093010). It will not go above the maximum zoom level before the tweaks in `about:config`.(In newer version of Firefox the default zoom value is `500`; I changed it to `700`, restarted the browser and tried to zoom in without success). Also, if one zooms in using Ctrl+Mouse Wheel above a `500` value, and tries to zoom out using the keyboard, the value will downgrade directly to `400`. 
>  [I'm leaving a recording of the keyboard scroll on Fx 100 here.](https://drive.google.com/file/d/1PnKX9yn79HaeOOJ9p-XaMuEP5dZg526m/view?usp=sharing)
> On macOS 11 and Ubuntu 20 the same behaviour is enconteured - mouse zooming is working as expected, but keyboard zooming is not.  
> Should I re-open this bug or fill a new one strictly related to the keybooard zoom issue? 
> Thank you in advance.

You would have to also change `toolkit.zoomManager.zoomValues`, which is a comma separated list of zoom values (divided by 100, so `.3` is 30%, and `5` is 500% - you'd want to add values (like `,6,7`) to the end to confirm zooming to 700 or w/e works.

(In reply to Ardelean Oana from comment #5)
> I was able to reproduce this issue on Firefox 98(20220304153049) on Win10 64-bit using the steps from the Description. The issue is partly resolved(zooming with Ctrl+Mouse Wheel behaves as expected), however, keyboard scrolling is still faulty on Firefox 100.0b7(20220417185951) and Nightly 101.0a1(20220419093010). It will not go above the maximum zoom level before the tweaks in `about:config`.(In newer version of Firefox the default zoom value is `500`; I changed it to `700`, restarted the browser and tried to zoom in without success). Also, if one zooms in using Ctrl+Mouse Wheel above a `500` value, and tries to zoom out using the keyboard, the value will downgrade directly to `400`. 
>  [I'm leaving a recording of the keyboard scroll on Fx 100 here.](https://drive.google.com/file/d/1PnKX9yn79HaeOOJ9p-XaMuEP5dZg526m/view?usp=sharing)
> On macOS 11 and Ubuntu 20 the same behaviour is enconteured - mouse zooming is working as expected, but keyboard zooming is not.  
> Should I re-open this bug or fill a new one strictly related to the keybooard zoom issue? 
> Thank you in advance.

You would have to also change `toolkit.zoomManager.zoomValues`, which is a comma separated list of zoom values (divided by 100, so `.3` is 30%, and `5` is 500% - you'd want to add values (like `,6,7`) to the end to confirm zooming to 700 or w/e works. Can you re-test with that and confirm it works?