Multi-process firefox crush
Firefox crush very often related to e10s(multi-process). The only solution is to disable multi-process in "about:config".
Affected platform(at least): Windows, Linux, MAC OS Affected version: from the first e10s-enabled version(I forgot) until the latest, including ESR.
To have a simple test: 1. Install Firefox; 2. Tweak some settings or not, just don't disable e10s yet; 3. To trigger a crush quickly, open a lot of PDF pages and switch between them, (however this is not the only way to trigger crushes); 4. Disable e10s in about:config; 5. Try step 3 again, now it's much harder to get a crush.
In the address bar, type about:crashes<enter>. Note: If any reports do not have BP- in front of the numbers/letters, click it to submit them.
The crash report is several pages of data. We need the report numbers to see the whole report.
Using your mouse, mark the most recent 7 - 10 crash reports, and copy them. Now go to the reply box and paste them in.
For more help on crash reports, see; https://support.mozilla.org/en-US/kb/firefox-crashes-asking-support