Server Error In Firefox

[LUEBECKER]

When I open a tab to the calibre server in Firefox, I get the error message

"TypeError: can't redefine non-configurable property "userAgent"
Error at http://127.0.0.1:8080/:1:321
Traceback (most recent call last):"

It keeps popping up intermittently when I x it out. It's very annoying.

How do I get rid of it? This just started happening after upgrading to calibre 3.41.2 64 bit.

[theducks]

Hmmm!
What is the extra stuff after the 8080

FWIW I just tried localhost:8080 on my system and it failed to find the server, but if I used the IP of the machine (hover over the Stop Server choice in Sharing. It will show your current IP), it works

[LUEBECKER]

Tried that, but still get similar error:

"TypeError: can't redefine non-configurable property "userAgent"
Error at #library_id=Calibre_Library1&panel=book_list:1:321
Traceback (most recent call last):

@http://192.168.1.4:8080/#library_id=Calibre_Library1&panel=book_list:1:321

[DNSB]

Originally Posted by LUEBECKER

How do I get rid of it? This just started happening after upgrading to calibre 3.41.2 64 bit.

When I open Firefox using either 127.0.0.1:8080 or IP_address:8080, it asks for my username and password, then pops up an error message "Error: Could not initialize database" and "You must allow calibre to use IndexedDB storage in your browser to read books". Oddly, I can't read books but download works despite the error message.

This is using calibre 3.41.3 and Firefox 66.0.3. Edge Dev Version 75.0.131.0 also works for the IP address but not for 127.0.0.1 (You are not authorized to view this site).

[LUEBECKER]

"This is using calibre 3.41.3 and Firefox 66.0.3. Edge Dev Version 75.0.131.0 also works for the IP address but not for 127.0.0.1 (You are not authorized to view this site)."

I am also using Firefox 66.0.3, but calibre 3.41.2. With edge I can use the 127.0.0.1:8080 address, but have to use the mobile version in Windows 10

[DNSB]

Originally Posted by LUEBECKER

"This is using calibre 3.41.3 and Firefox 66.0.3. Edge Dev Version 75.0.131.0 also works for the IP address but not for 127.0.0.1 (You are not authorized to view this site)."

I am also using Firefox 66.0.3, but calibre 3.41.2. With edge I can use the 127.0.0.1:8080 address, but have to use the mobile version in Windows 10

Edge Dev is not the standard Edge browser, it's the new version based on the Chromium project code base. See Microsoft Edge Insider Channels for more information.

[kovidgoyal]

@DNSB Use a fresh firefox profile, IIRC firefox has various issues with IndexedDB and profile corruption.

@LUEBECKER: calibre does not do anything with userAgent so that error is not coming from it, do you have some kind of user script installed?

[LUEBECKER]

@LUEBECKER: calibre does not do anything with userAgent so that error is not coming from it, do you have some kind of user script installed?

No script. This error just started occurring after I upgraded to calibre 3.41.2

[kovidgoyal]

Sorry, I'm at a loss. I cannot reproduce it in Firefox and grepping the calibre source-code finds no instances of attempts to assign to navigator.userAgent

[gbm]

The OP for troubleshooting needs to start with a fresh firefox profile, I know that the last Windows update trashed my sisters firefox profile.

It's getting to the point I am thinking about sending MS an invoice to fix her laptop after each update.

bernie

[LUEBECKER]

Originally Posted by kovidgoyal

Sorry, I'm at a loss. I cannot reproduce it in Firefox and grepping the calibre source-code finds no instances of attempts to assign to navigator.userAgent

Creating a fresh Firefox profile solved this problem as well

[LUEBECKER]

Originally Posted by gbm

The OP for troubleshooting needs to start with a fresh firefox profile, I know that the last Windows update trashed my sisters firefox profile.

It's getting to the point I am thinking about sending MS an invoice to fix her laptop after each update.

bernie

Thanks. This worked for me. With the new Firefox profile, I no longer received the error.