Go to about:config and try changing accessibility.force_disabled to 1 then restart the browser. Alternatively uninstall "買い物ポケット" (KaipokeWin.exe).

Does it still happen in Troubleshoot Mode?

Note that this crash reports is about OOM (out of memory) reports where not enough contiguous free memory is available.

Available Page File : 777,859,072 bytes (777.86 MB)
Available Physical Memory : 959,021,056 bytes (959.02 MB)
System Memory Use Percentage : 88
OOM Allocation Size : 896 bytes

KaipokeWin.exe is listed as an AccessibilityClient: KaipokeWin.exe|1.1.0.1

If you use a fixed size for the page file then try the automatic setting and let Windows handle the page file size automatically.

• Control Panel -> System -> Advanced -> Performance -> Settings