702743 - Firefox 8 Html5 <input> tag multiple file selection bug (number of files limited in Windows 7)

Status: RESOLVED FIXED

(Core :: DOM: Core & HTML, defect)

Description

[mariotti.adam]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1
Build ID: 20110928134238

Steps to reproduce:

I found a bug with multiple file selection of the Html5 <input> tag while working on a project. For example, take the following element:

<input type="file" name="filesToUpload" id="filesToUpload" multiple="multiple" onchange="fileSelected();"/>
fileSelected() can just contain an alert or something to let you know the event is firing.

The new multiple property of the input tag should allow you to select multiple files in the file selection window when it comes up (as opposed to Html4 where you could only select one).


Actual results:

The problem is that in Firefox 8, this multiple file selection is limited to a certain number of files. In Firefox 7, enabling the multiple property allows you to select what seems like as many files as you would like (I selected about 2000 files at once in testing). However, in Firefox 8, selecting more than about 100 files at once seems to just break the file selection. If you select too many files and press open, the file selection window just closes and acts as if nothing happened. 

I have seen similar behavior that are issues with Flash based file selectors, but am pretty certain this is a bug in Firefox 8 as the multiple file selection seems to work flawlessly with as many files as you want on Firefox 7 as well as other Html5 compliant browsers (Chrome).


Expected results:

The multiple file selection should work as it does in Firefox 7 and other Html5 compliant browsers and allow you to select as many files as you want in the file selection window. I see that the design/layout of the file selection window has changed between Firefox 7 and 8 and wonder if this functionality was accidentally messed up during the change. I installed some of the beta versions on Firefox 8 and saw that this file selection problem, as well as the new file selection window layout, first appeared in release 8.0b4.

Comment 1

[j.j.]

See bug 660833 comment 31 (it is fixed on winXP)
If I undestand things right, this will be fixed with bug 61991.
Can someone confirm this?

Comment 2

[Sebastian Zartner [:sebo]]

I just tried this with more than 3000 files using Firefox 57.0 on Windows 10 and it worked fine for me. So, I'm finally closing this.

Sebastian