Tap here to go to the mobile version of the site.
Your Firefox is out of date and may contain a security risk! Upgrade Firefox

Support Forum

There is a bug in FF 14,15,16 (I believe all 3) regarding mousedown x/y in an SVG canvas area. Please advise how to report this and have someone fix it.


I am a web developer. The bug is in latest versions of FF however works fine in previous versions 6-9 (I believe), IE,Chrome. Please go to http://partybannerman.com/svg2/svg-editor.php?id=108&catid=35&wch=MXx5

Select the number 7 with the arrow tool. Observe the location of the cursor Click-drag the selection and closely watch the cursor. The cursor no longer is in the same relative position. relative to the object selected. This is particularly annoying when zoomed into the "7".

The precision is necessary for commands that we are implementing that require the cursor position relative to the object selected to be exact.

Please advise, and thanks for your help

Additional System Details

This happened

Every time Firefox opened

This started when...

version 14 I think

Installed Plug-ins

  • Shockwave Flash 11.4 r402
  • Google Update
  • np-mswmp
  • Adobe PDF Plug-In For Firefox and Netscape "9.5.2"
  • 4.1.10329.0
  • Octoshape embedded video plugin
  • Nitro PDF Plug-In For Firefox and Netscape
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Office Plugin for Netscape Navigator


  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/20100101 Firefox/16.0

More Information

see above

  • Top 25 Contributor
  • Moderator
622 solutions 8022 answers

Not entirely sure I follow your instructions. One thing I do note is the initial starting position of the "7" differs when I compare Firefox (17 or 10) with Chrome. Is that relevant ?

I wonder if part of the difference may be in how differing browsers cope with the code. I am not a developer and do not know how relevant this is but I note if I try the validator http://validator.w3.org/unicorn/ it is returning some errors.

If you do think there is a bug try to make a simple test-case that demonstrates this and post in bugzilla. If this appears to be a regression it would be handy to pin it down at least to a particular Firefox version, although users should not now be using Firefox 6-9. (Drill down from here if you need an old version of Firefox to run tests with)

Someone more knowledgeable may provide further information, or if you need advice on troubleshooting coding issues you may find this forum useful http://forums.mozillazine.org/viewforum.php?f=25

Question owner

Problem exists starting w/ version 13.0.1 and through current. It is fine in v12.

The cursor should remain in the exact position within the "7" when it is dragged to another area of the canvas.

Validator errors appear to be erroneous for the most part.

I will post in bugzilla.

Thanks for the reply.