"%matplotlib notebook" not working in firefox with matplotlib 3.3.1

[stefanazzz]

Bug report

Bug summary

using "%matplotlib notebook" to get interactive plots in notebook running on firefox browser stopped working upon upgrade from matplotlib 3.1.1 to 3.3.1. Firefox 68.0.1 (64-bit) for Linux MINT.

Still works fine in google chrome. Other interactive like "%matplotlib widget" or "%matplotlib ipympl" are OK in both firefox & chrome.

No error message, just a small triangle appears in lieu if the plot in the notebook.

Code for reproduction

# Paste your code here
%matplotlib notebook
import matplotlib
import matplotlib.pyplot as plt
fig,ax=plt.subplots()
ax.plot([0,1,2],[1.1,2.3,4],'o');
print(matplotlib.__version__)
#
#

Actual outcome

# If applicable, paste the console output here
#
#

Expected outcome

Used to work in matplotlib 3.1.1

Matplotlib version

• Operating system: Linux MINT

• Matplotlib version: 3.3.1

• Matplotlib backend (print(matplotlib.get_backend())): nbAgg

• Python version: 3.7.8 | packaged by conda-forge

• Jupyter version (if applicable):
  jupyter core : 4.6.3
  jupyter-notebook : 6.1.4
  qtconsole : 4.7.5
  ipython : 7.17.0
  ipykernel : 5.3.4
  jupyter client : 6.1.6
  jupyter lab : not installed
  nbconvert : 5.6.1
  ipywidgets : 7.5.1
  nbformat : 5.0.7
  traitlets : 4.3.3

• Other libraries:

install from conda

channels:

• gimli
• anaconda
• conda-forge
• defaults

[jklymak]

I cannot reproduce this on master with Firefox (80.0.1 (64-bit)) on my mac. 1) that's a pretty old firefox? 2) maybe change the order to put the %matplotlib notebook after the import?

[QuLogic]

I can reproduce this with IceCat, which is still on the 68 ESR line.

[QuLogic]

I thought it was older, but you actually need Firefox 69 for ResizeObserver. I could try and find a shim if we want to continue supporting ESR.

[QuLogic]

Ah, so it turns out that Firefox 68 does support ResizeObserver, but it was experimental and hidden behind a flag. If you go to about:config, and set layout.css.resizeobserver.enabled to true, then it's fixed. As there's a workaround, I don't want to hold up 3.3.2 on this, but maybe for 3.3.3 (if that happens), we can think about the shim idea.

[stefanazzz]

I confirm that setting layout.css.resizeobserver.enabled to true in firefox fixes it. However I am sharing notebooks with other users, this will force each firefox user to implement the fix on their own browser, not ideal. Maybe the idea of a fix in 3.3.3 is not bad, unless future firefox releases revert to true resizeobserver by default. --And Thanks!

On Mon, Sep 14, 2020 at 11:01 PM Elliott Sales de Andrade < ***@***.***> wrote: Ah, so it turns out that Firefox 68 does support ResizeObserver, but it

was experimental and hidden behind a flag. If you go to about:config, and set layout.css.resizeobserver.enabled to true, then it's fixed. As there's a workaround, I don't want to hold up 3.3.2 on this, but maybe for 3.3.3 (if that happens), we can think about the shim idea.

…

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

[QuLogic]

It's enabled in all releases after 68; this is only a problem in ESR.

[stefanazzz]

Sounds like problem will fix itself with next browser update then. No reason to follow up. Cheers

…

On Wed, Sep 16, 2020 at 8:35 AM Elliott Sales de Andrade < ***@***.***> wrote: It's enabled in all releases after 68; this is only a problem in ESR. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#18481 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKX4DUQ66QTYV7XNMUXBUKLSGBTEPANCNFSM4RL6RBNA> .