commit 8bd3ef487932654d78bfab848b65fb04b0094e3b Author: Georg Koppen <gk@torproject.org> Date: Mon May 29 13:31:07 2017 +0000 Bug 21972: about:support is partially broken --- toolkit/modules/Troubleshoot.jsm | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/toolkit/modules/Troubleshoot.jsm b/toolkit/modules/Troubleshoot.jsm index cc545b4..364d5e1 100644 --- a/toolkit/modules/Troubleshoot.jsm +++ b/toolkit/modules/Troubleshoot.jsm @@ -469,8 +469,11 @@ var dataProviders = { // Eagerly free resources. let loseExt = gl.getExtension("WEBGL_lose_context"); - loseExt.loseContext(); - + // This extension is not necessarily available. Check for it. Fixes bug + // 21972. + if (loseExt) { + loseExt.loseContext(); + } return contextInfo; }