Unable to scroll 1 pixel (Alt + mouse wheel) more (after updating FF from 12.0 to 20.0.1) - is there a solution without Add-ons?

Since I need a pixel of ScrollBar of the browser window, in FF 12.0 I used:

MouseWheel.withaltkey.action = 4

MouseWheel.withaltkey.numlines = 1

MouseWheel.withaltkey.sysnumlines = false

and I was able to use Alt + wheel to scroll the content of only 1 pixel.

However, after updated to FF 20.0.1 Alt + mouse wheel stopped working so I try to reactivate the feature, but without success. According to me, there were a few changes from 17 FF:

https://wiki.Mozilla.org/Gecko:Mouse_Wheel_Scrolling

Pixel scrolling seem to be now removed from suggestions, action = 4 once upon a time "Document scroll by a number of pixels (given by the numlinesrequired property)" and now it says:

' Note that unlike 16 or earlier, you cannot specify the unit values of delta such as scrolling by pixel, line or page. That is, you cannot specify the value of deltaMode of DOM WheelEvent with all preferences. Under Windows, the unit of scrolling is online or page with the mouse wheel. »

Is there a solution to re - activate a pixel scrolling without having to install Add - ons (each add-on for smooth scrolling some other behavior changes)?

There was changes in the prefs of mousewheel as a result of the implementation of the DOM3 (Bug 719320) scrolling mouse wheel.

I don't think that it is possible to replace / adjust the amount of scrolling when you use a modifier key for a certain number of pixels.

There is only the delta multipliers that change the number of lines (33 changes scrolling amount to one-third), so probably closed you can get is to assign the action to the modifier Alt 1 (or 1% of the default).

You can change mousewheel.*.delta_multiplier_y prefs (vertical axis) to change the vertical scroll amount.

  • MouseWheel.system_scroll_override_on_root_content. Enabled-> true
  • MouseWheel.with_control.delta_multiplier_y

Tags: Firefox

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