1283244 - mouse down + mouse up no longer seems to work in popular js libraries

Status: RESOLVED INCOMPLETE

(Core :: Widget: Cocoa, defect)

Description

[Mike Nolan [:nolski]]

This may be a bit vague or a duplicate but I'll try to sum up the issue as best as possible.

I noticed in FF 49 that a popular javascript project Timeline JS3 http://timeline.knightlab.com/ seemed to have some issues that didn't appear in 47. The library uses the mousedown and mouseup events to trigger. These events no longer seem to trigger as of FF 49.

Comment 1

[:Gijs (he/him)]

That page seems to work for me on 48 beta as well as devedition 49, including the timeline about the history of women in computing.

Can you provide more detailed steps / pointers to what's broken?

Comment 2

[Mike Nolan [:nolski]]

The timeline portion of the interactive (the part with the dates and events) is an element that you can click and drag left and right to scroll through the timeline. When you hover your mouse over it you get cursor: move. In 47 you can click and drag this just fine but in 49 it no longer seems to work. It looks like there is a javascript event listener for mousedown that no longer fires.

Comment 3

[:Gijs (he/him)]

(In reply to Mike Nolan [:nolski] from comment #2)
> The timeline portion of the interactive (the part with the dates and events)
> is an element that you can click and drag left and right to scroll through
> the timeline. When you hover your mouse over it you get cursor: move. In 47
> you can click and drag this just fine but in 49 it no longer seems to work.
> It looks like there is a javascript event listener for mousedown that no
> longer fires.

WFM on OS X. Can you try in safe mode (Help > Restart with add-ons disabled)? What platform are you testing on? Can you provide the output from about:support?

Comment 4

[ovidiu boca[:Ovidiu]]

Tested on Mac OS X 10.10 with FF Nightly 50.0a1 (2016-07-03), and FF DEvelopers Edition 49.0a2 (2016-07-03) and I can't reproduce it. Please see comment 3 and follow the steps from there.

Comment 5

[ovidiu boca[:Ovidiu]]

Mike, do you have any updates about this issue? If not, in a couple of days,  I will close this as incomplete.

Comment 6

[ovidiu boca[:Ovidiu]]

Mike, for now I will close this as Resolved: Incomplete, feel free to reopen it any time, and also please provide the needed information from comment 3.

Comment 7

[Mike Nolan [:nolski]]

Apologies, I have been without a computer for the last month and a half. I restarted with addons disabled and this problem still persists in FF50 but seems to work in 48. It's tough to describe the problem but it has to do with mouse down activating in javascript. Perhaps it's just an issue with a library but I find it odd that it works in one version of Firefox and not another. 

In the example the element that /should/ be draggable left and right is .tl-timenav.

output of about:support is below

Application Basics
------------------

Name: Firefox
Version: 50.0a2
Build ID: 20160815004002
Update Channel: aurora
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:50.0) Gecko/20100101 Firefox/50.0
OS: Darwin 15.6.0
Multiprocess Windows: 1/1 (Enabled by default)
Safe Mode: true

Crash Reports for the Last 3 Days
---------------------------------

All Crash Reports

Extensions
----------

Name: FlyWeb
Version: 1.0.0
Enabled: true
ID: [e-mail]

Name: Multi-process staged rollout
Version: 1.0
Enabled: true
ID: [e-mail]

Name: Pocket
Version: 1.0.4
Enabled: true
ID: [e-mail]

Name: Web Compat
Version: 1.0
Enabled: true
ID: [e-mail]

Name: 1Password
Version: 4.5.8
Enabled: false
ID: [e-mail]

Name: Activity Stream
Version: 1.1.1
Enabled: false
ID: @activity-streams

Name: Disconnect
Version: 3.15.3.1-signed.1-signed
Enabled: false
ID: [e-mail]

Name: Google Docs Line Numbers
Version: 1.1.1
Enabled: false
ID: @gdocs-line-numbers

Name: Greasemonkey
Version: 3.8
Enabled: false
ID: {e4a8a97b-f2ed-450b-b12d-ee082ba24781}

Name: JSONView
Version: 1.1.1
Enabled: false
ID: [e-mail]

Name: LastPass
Version: 3.3.1
Enabled: false
ID: [e-mail]

Name: MeasureIt
Version: 0.4.15
Enabled: false
ID: {75CEEE46-9B64-46f8-94BF-54012DE155F0}

Name: No More 404s
Version: 1.5.5
Enabled: false
ID: [e-mail]

Name: Password Exporter
Version: 1.3.2
Enabled: false
ID: {B17C1C5A-04B1-11DB-9804-B622A1EF5492}

Name: React Devtools
Version: 0.15.0
Enabled: false
ID: @react-devtools

Name: Stylish
Version: 2.0.7
Enabled: false
ID: {46551EC9-40F0-4e47-8E18-8E5CF550CFB8}

Name: Tab Center
Version: 1.23
Enabled: false
ID: [e-mail]

Name: Terms of Service; Didn’t Read
Version: 0.4.1.1-signed.1-signed
Enabled: false
ID: jid0-3GUEt1r69sQNSrca5p8kx9Ezc3U@jetpack

Name: Test Pilot
Version: 0.8.3-tag-2016-07-29
Enabled: false
ID: @testpilot-addon

Name: uBlock Origin
Version: 1.8.4
Enabled: false
ID: [e-mail]

Name: Universal Search
Version: 1.0.8
Enabled: false
ID: [e-mail]

Name: Vertical Tabs (Simplified)
Version: 0.1
Enabled: false
ID: [e-mail]

Name: Vertical Tabs (Simplified)
Version: 0.1
Enabled: false
ID: [e-mail]

Name: Whimsy Pro
Version: 2.1.0
Enabled: false
ID: jid1-6mUPixNFCjAgkg@jetpack

Graphics
--------

Features
Compositing: Basic
Asynchronous Pan/Zoom: wheel input enabled
WebGL Renderer: WebGL is currently disabled.
WebGL2 Renderer: WebGL is currently disabled.
Hardware H264 Decoding: Yes
Audio Backend: audiounit
GPU #1
Active: Yes
Vendor ID: 0x8086
Device ID: 0x0d26

Diagnostics
AzureCanvasAccelerated: 1
AzureCanvasBackend: skia
AzureContentBackend: skia
AzureFallbackCanvasBackend: none
TileHeight: 1024
TileWidth: 1024
Decision Log
HW_COMPOSITING:
blocked by runtime: Acceleration blocked by safe-mode
OPENGL_COMPOSITING:
unavailable by default: Hardware compositing is disabled




Important Modified Preferences
------------------------------

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browser.cache.disk.capacity: 0
browser.cache.disk.filesystem_reported: 1
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browser.cache.disk.smart_size.enabled: false
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browser.download.importedFromSqlite: true
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browser.sessionstore.upgradeBackup.latestBuildID: 20160815004002
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dom.w3c_touch_events.enabled: 1
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gfx.blacklist.direct2d.failureid: FEATURE_FAILURE_DL_BLACKLIST_g984
gfx.blacklist.hardwarevideodecoding.failureid: FEATURE_FAILURE_DL_BLACKLIST_g1208
gfx.crash-guard.glcontext.appVersion: 46.0a2
gfx.crash-guard.glcontext.deviceID: 0x0d26
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media.benchmark.vp9.fps: 235
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media.gmp-gmpopenh264.lastUpdate: 1470941506
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media.gmp-manager.lastCheck: 1471355570
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media.gmp-widevinecdm.lastUpdate: 1470797920
media.gmp-widevinecdm.version: 1.4.8.903
media.gmp.storage.version.observed: 1
network.cookie.cookieBehavior: 3
network.cookie.prefsMigrated: true
network.http.speculative-parallel-limit: 0
network.predictor.cleaned-up: true
network.prefetch-next: false
places.database.lastMaintenance: 1470799758
places.history.expiration.transient_current_max_pages: 119838
plugin.disable_full_page_plugin_for_types: application/pdf
plugin.importedState: true
privacy.clearOnShutdown.passwords: false
privacy.sanitize.migrateClearSavedPwdsOnExit: true
security.tls.version.min: 0
services.sync.declinedEngines:
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services.sync.lastPing: 1471317198
services.sync.lastSync: Tue Aug 16 2016 00:13:20 GMT-0400 (EDT)
services.sync.numClients: 1
storage.vacuum.last.index: 1
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Important Locked Preferences
----------------------------

Places Database
---------------

JavaScript
----------

Incremental GC: true

Accessibility
-------------

Activated: false
Prevent Accessibility: 0

Library Versions
----------------

NSPR
Expected minimum version: 4.12
Version in use: 4.12

NSS
Expected minimum version: 3.26
Version in use: 3.26

NSSSMIME
Expected minimum version: 3.26
Version in use: 3.26

NSSSSL
Expected minimum version: 3.26
Version in use: 3.26

NSSUTIL
Expected minimum version: 3.26
Version in use: 3.26

Experimental Features
---------------------

Comment 8

[ovidiu boca[:Ovidiu]]

Mike, can you please add

Comment 9

[ovidiu boca[:Ovidiu]]

Sorry for comment 8, Mike can you please try with new profile: https://nightly.mozilla.org/
Also please disable the multi-process from FF50 and try it again.

Comment 10

[Jim Mathies [:jimm]]

Without good str, this is going to be impossible to track down.