Le Sat, 19 Jan 2019 16:49:02 +0100, Ludovic Courtès a écrit : > Hello, > > If you enable WebGL support in ‘about:config’, then stop it and run: > > --8<---------------cut here---------------start------------->8--- > $ export LIBGL_DRIVERS_PATH=$(guix build mesa)/lib/dri > $ icecat https://get.webgl.org > 1547912837231 > addons.webextension.tortm-browser-button@jeremybenthum WARN > Please specify whether you want browser_style or not in your > browser_action options. 1547912837231 > addons.webextension.https-everywhere@eff.org WARN Please > specify whether you want browser_style or not in your browser_action > options. 1547912837232 > addons.webextension.{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d} > WARN Please specify whether you want browser_style or not in your > browser_action options. JavaScript warning: > moz-extension://b84ee99d-7e50-4975-9d16-3806d330a3b2/lib/adblockplus.js, > line 0: Successfully compiled asm.js code (total compilation time > 1ms; not stored in cache (too small ) libGL error: MESA-LOADER: > failed to retrieve device information libGL error: unable to load > driver: i915_dri.so libGL error: driver pointer missing libGL error: > failed to load driver: i915 libGL error: MESA-LOADER: failed to > retrieve device information libGL error: unable to load driver: > i915_dri.so libGL error: driver pointer missing libGL error: failed > to load driver: i915 libGL error: unable to load driver: > swrast_dri.so libGL error: failed to load driver: swrast JavaScript > warning: https://get.webgl.org/, line 193: Error: WebGL warning: > Failed to create WebGL context: WebGL creation failed: > * Error during native OpenGL init. > * Exhausted GL driver caps. > * Exhausted GL driver options. > JavaScript warning: https://get.webgl.org/, line 197: Error: WebGL > warning: Failed to create WebGL context: WebGL creation failed: > * Error during native OpenGL init. > * Exhausted GL driver caps. > * Exhausted GL driver options. > --8<---------------cut here---------------end--------------->8--- > > and the web page reads: > > While your browser seems to support WebGL, it is disabled or > unavailable. > > Weird thing is that glxgears and glxinfo (from ‘mesa-utils’) both work > well. > > Thoughts? > > Ludo’. Try setting security.sandbox.content.read_path_whitelist to /gnu/store/ (with a leading /) in about:config.