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Firefox won't start after update to Firefox 75

Just updated to v75.. and it broke my Firefox installation. It now won't load. I get a message: "The procedure entry point ??0Mutexlmpl@detail@mizill@@QEAA@XZ could not b… (read more)

Just updated to v75.. and it broke my Firefox installation. It now won't load. I get a message:

"The procedure entry point ??0Mutexlmpl@detail@mizill@@QEAA@XZ could not be located in the dynamic link library C:\Program Files\Mozilla\Firefox\xul.dll."

and on clicking "OK" (no choice) I get another:

"Couldn't load XPCOM."

rats... I could uninstall and start over, but I'll lose all my bookmarks... unless - can I get at these and save them first for later import, or any other ideas...? (I've tried a reboot.)

Asked by Phil 7 months ago

Answered by Phil 7 months ago

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Can't open Firefox at all

I woke up to get online and once I tried to open Firefox I get a message I've never seen before. I took two screenshots which I will submit, because I couldn't enlarge th… (read more)

I woke up to get online and once I tried to open Firefox I get a message I've never seen before. I took two screenshots which I will submit, because I couldn't enlarge the window that the message is in so I'll type it out here as well. I'm terrified of having to uninstall Firefox because I don't want to lose all of the important data and bookmarks I have. So hopefully someone here recognizes this issue and can help! The characters in the window look like this:

can't find procedure entry point ??Mutexlmpl@detail@mozilla@@QEAA@XZ dynamic link library C;\Programfiles\mozillafirefoxxl\.dll.

Then another window it said; Couldn't load XPCOM

Now I get the program files part so that's not the issue. But I've never seen this other stuff before. So like I said, I'm hoping that someone here understands what this is and that its fixable without having to uninstall Firefox.

Thanks ahead of time for any help you all may have! And I'm happy to answer any questions someone may have.

Michael....

Asked by MKS1 7 months ago

Answered by FredMcD 7 months ago

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75.0 craches after install

Updated from last 74.x to 75.0 after "update available" prompt. 75.0 crashes on startup. Reboot did not solve the problem. 2 error mags (attached). Restored 74.x from ba… (read more)

Updated from last 74.x to 75.0 after "update available" prompt. 75.0 crashes on startup. Reboot did not solve the problem. 2 error mags (attached).

Restored 74.x from backup. Restarted FF, it restarted the update and completed. Now running 75.0. System Win 10 Pro, up to date. It appears the update was incomplete. The referenced dll was shown as new version when the folder was examined. Richard

Asked by Rich-J 7 months ago

Answered by Rich-J 7 months ago