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Change tabs with mousewheel in Firefox 57
// Change tabs with mousewheel
// Run into Browser Toolbox console
var onTabWheel = function(ev) {
if (ev.deltaMode == 1 /* DOM_DELTA_LINE */) {
var idx = gBrowser.tabContainer.getIndexOfItem(gBrowser.selectedTab);
if (ev.deltaY > 0) {
if (idx + 1 < gBrowser.tabs.length) {
gBrowser.selectTabAtIndex(idx + 1);
}
} else if (ev.deltaY < 0) {
if (idx > 0) {
gBrowser.selectTabAtIndex(idx - 1);
}
}
}
}
gBrowser.tabContainer.mTabstrip._scrollbox.addEventListener("wheel", onTabWheel);
@Chaphasilor

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@Chaphasilor Chaphasilor commented Nov 16, 2017

Hey, I tried running your code but I get an error saying "gBrowser is not defined".
Any ideas?

@benoitryder

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@benoitryder benoitryder commented Nov 16, 2017

Did your try to run it in the Browser Toolbox?

@Keith94

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@Keith94 Keith94 commented Nov 21, 2017

I get the same error in Fx59. :( I put it in Browser Toolbox console.

TypeError: gBrowser.tabContainer.mTabstrip is undefined

@fm3

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@fm3 fm3 commented Nov 21, 2017

works for me, thanks! is there a way to run this on startup?

@benoitryder

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@benoitryder benoitryder commented Nov 24, 2017

@Keith94 The first revision of the gist doesn't use mTabstrip. It might work with your version.

@fm3 Not that I know of. :(

@sanao

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@sanao sanao commented Jan 25, 2018

The lastest version doesn't works with Firefox 58, but the first version works well.

Vote here to integrate this feature natively.

@fm3

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@fm3 fm3 commented Jan 27, 2018

For compatibility with Firefox 58, in my fork I changed mTabstrip._scrollbox to arrowScrollbox. They renamed it in 1415537

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