Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh).

Is the problem still there?

While still in Safe Mode,

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 resent 7 - 10 crash reports, and copy them. Now go to the reply box below and paste them in.

(Please don't take a screenshot of your crashes, just copy and paste the IDs. The below image is just an example of what your Firefox screen should look like.)

While in safe mode, the crash problem did not occur when I tried to create a new bookmark, it still crashed once I am not in safe mode. Does this mean that I need to run firefox browser from safe mode from now on? Wouldn't it mean that I will not be able to have the "ADD-ons"?

ce8f712f-7991-4e22-bc35-7f86d9064a3a d5ca32ab-6e92-495d-9e44-cf6daa772694 cc33d140-d859-41e3-a161-3f8cbe3b8738 40bdb3ee-8b93-4ad8-b7dd-2795375cd2b0 44b553b5-74f3-42db-b621-9f3a1ee41729 3c44c22b-819c-4579-a2eb-2e17db5d9ff7 cf170c1f-0604-43e1-97f4-c8ecb7f0610c 143e5e30-1c20-4eda-b37b-3a0ab2b33cbb e227964c-9e87-4836-991e-c49a6612f32f cedfc057-2ec8-4160-a1f3-7143577fce85 b8099d64-5787-48f1-843e-cc305d5f0759 40ed1021-3ba8-4835-8461-2db6aaab8d30

Some of your crash reports weren’t sent to the Mozilla Servers.

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.

It could be the work of one of your add-ons. Type about:addons<enter> in the address bar to open your Add-ons Manager. Hot key; <Control>(Mac=<Command>)<Shift> A)

In the Add-ons Manager, on the left, select Extensions. Disable a few add-ons, then Restart Firefox.

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All of them.

If the problem continues, disable some more (restarting FF). Continue until the problem is gone. After, you know what group is causing the issue. Re-enable the last group ONE AT A TIME (restarting FF) until the problem returns.

Once you think you found the problem, disable that and re-enable all the others, then restart again. Let us know who the suspect is, detective.

I had 2 Add-on which looked suspicious. One of them was Test Pilot and the other was iCloud Bookmarks. I disabled both. Creating and saving new bookmarks in my Firefox browser worked fine, i.e. without crash.

Further, I re-enabled Test Pilot, it still worked up to this date. So, I think it was iCloud Bookmarks add-on which caused crashes.

Thanks.

Tong

Good to hear. Contact its support and let them know.