[Sony Xperia XZ1 Compact ROMs, Kernels, Recoveries,] Rrreutel:
Using Firefox on 1.5, so I haven't had this issue. I installed chrome just for testing, and it indeed crashes after some time. Looking at logcat just before crashing I see errors related to widevine service not being registered/loadable. I have no knowlegde about this service, but I see this commit from aug. 28 which seems to remove a widevine related library (at least by library name it seems that way):

vendor/lib/mediadrm/libwvdrmengine.so

And here deletion of some libraries with DRM in the name, not sure at all if related.

part of logcat:

09-16 21:20:15.665 30613 30663 I PlayCommon: [56] aetv.j(22): Preparing logs for uploading
09-16 21:20:15.668 30613 30663 I PlayCommon: [56] aetv.j(131): Connecting to server for timestamp: https://play.googleapis.com/play/log/timestamp
09-16 21:20:15.879 30613 30663 I PlayCommon: [56] aetv.j(163): Connecting to server: https://play.googleapis.com/play/log?format=raw&proto_v2=true
09-16 21:20:15.958 30613 30663 I PlayCommon: [56] aetv.j(196): Successfully uploaded logs.
09-16 21:20:16.456 31574 31574 W HidlServiceManagement: Waited one second for android.hardware.drm@1.2::IDrmFactory/widevine
09-16 21:20:16.459 698 698 I hwservicemanager: Since android.hardware.drm@1.2::IDrmFactory/widevine is not registered, trying to start it as a lazy HAL.
09-16 21:20:16.461 31574 31574 I HidlServiceManagement: getService: Trying again for android.hardware.drm@1.2::IDrmFactory/widevine...
09-16 21:20:16.467 698 32570 W libc : Unable to set property "ctl.interface_start" to "android.hardware.drm@1.2::IDrmFactory/widevine": error code: 0x20
09-16 21:20:16.467 698 32570 I hwservicemanager: Tried to start android.hardware.drm@1.2::IDrmFactory/widevine as a lazy service, but was unable to. Usually this happens when a service is not installed, but if the service is intended to be used as a lazy service, then it may be configured incorrectly.
09-16 21:20:15.772 0 0 E init : Control message: Could not find 'android.hardware.drm@1.2::IDrmFactory/widevine' for ctl.interface_start from pid: 698 (/system/bin/hwservicemanager)
09-16 21:20:17.462 31574 31574 W HidlServiceManagement: Waited one second for android.hardware.drm@1.2::IDrmFactory/widevine
09-16 21:20:17.463 698 698 I hwservicemanager: Since android.hardware.drm@1.2::IDrmFactory/widevine is not registered, trying to start it as a lazy HAL.
09-16 21:20:17.464 31574 31574 I HidlServiceManagement: getService: Trying again for android.hardware.drm@1.2::IDrmFactory/widevine...
09-16 21:20:16.772 0 0 E init : Control message: Could not find 'android.hardware.drm@1.2::IDrmFactory/widevine' for ctl.interface_start from pid: 698 (/system/bin/hwservicemanager)
09-16 21:20:17.467 698 32571 W libc : Unable to set property "ctl.interface_start" to "android.hardware.drm@1.2::IDrmFactory/widevine": error code: 0x20
09-16 21:20:17.467 698 32571 I hwservicemanager: Tried to start android.hardware.drm@1.2::IDrmFactory/widevine as a lazy service, but was unable to. Usually this happens when a service is not installed, but if the service is intended to be used as a lazy service, then it may be configured incorrectly.
09-16 21:20:17.558 1634 2007 W InputDispatcher: Window 212d570 com.android.chrome/com.google.android.apps.chrome.Main (server) is unresponsive: 212d570 com.android.chrome/com.google.android.apps.chrome.Main (server) is not responding. Waited 5000ms for MotionEvent
09-16 21:20:17.558 1634 2007 W InputDispatcher: Canceling events for 212d570 com.android.chrome/com.google.android.apps.chrome.Main (server) because it is unresponsive
09-16 21:20:17.559 1634 2007 I WindowManager: ANR in Window{212d570 u0 com.android.chrome/com.google.android.apps.chrome.Main}. Reason:212d570 com.android.chrome/com.google.android.apps.chrome.Main (server) is not responding. Waited 5000ms for MotionEvent