CORS errors when disabling cache in developer tools

Hello, When I open the developer tools (using F12) and I check the disable cache checkbox of the network tab, I get CORS errors saying that `Cross-Origin Request Blocked… (了解更多)

Hello,

When I open the developer tools (using F12) and I check the disable cache checkbox of the network tab, I get CORS errors saying that `Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://<my-resource>. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).`.

From my understanding, since the requests triggering the errors have the `Cache-Control` header set (due to the cache disabling), these requests do not qualify as simple requests (https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests). That’s why the server (AWS CloudFront) does not return CORS headers. However, I do not understand why Firefox did not send preflight requests (https://developer.mozilla.org/en-US/docs/Glossary/Preflight_request) in these cases.

Did I miss something? Or am I hitting a bug in Firefox?

Regards

Yann Soubeyrand 于 3 分钟前提问

Firefox brawser opens another webpage than the one commanded

Hi I browsed some time back in Spotify, then I didn't select it and deleted. BUT every time now that I want to open Paypal.com in my firefox browser it opens a Spotify pa… (了解更多)

Hi I browsed some time back in Spotify, then I didn't select it and deleted. BUT every time now that I want to open Paypal.com in my firefox browser it opens a Spotify page. Can you pls help with this issue? Thanks

Gerry452 于 1 周前提问

Constant crashing

I keep constantly crashing, multiple times. Here are my latest crash IDs: bp-0095be94-4487-4e51-b895-8bfe30250106 bp-cc9fbd3f-9c73-4a9b-9e67-a503b0250106 bp-46a54455-3… (了解更多)

I keep constantly crashing, multiple times. Here are my latest crash IDs:

bp-0095be94-4487-4e51-b895-8bfe30250106

bp-cc9fbd3f-9c73-4a9b-9e67-a503b0250106

bp-46a54455-3bd3-4eb1-8cdf-887300250106

bp-9d721d1d-f4e3-4e7b-9160-ec47e0250106

bp-f307e36d-2c7b-4fad-9166-47cef0250106

bp-3e823f9a-bcb3-458f-b149-94a110250106

sir.beret 于 11 分钟前提问

home page

Good afternoon! Why can't I set the Group Speed Dial tabs as the Home page? I have done everything correctly everywhere, but still opens the start page of Google. Help me… (了解更多)

Good afternoon! Why can't I set the Group Speed Dial tabs as the Home page? I have done everything correctly everywhere, but still opens the start page of Google. Help me to solve this problem, I use your default browser and it brings me some discomfort.

Eduardo 于 12 分钟前提问

Syncing multiple deviced

Hi! I bought a second MacBook, but cannot find any accurate instructions for adding it as one of my devices. On the MacBook, I get the QR code page, but nowhere in the … (了解更多)

Hi! I bought a second MacBook, but cannot find any accurate instructions for adding it as one of my devices.

On the MacBook, I get the QR code page, but nowhere in the phone is the supposed "Sync" page to scan that code. I literally looked in every single area that I could. These are the instructions:

Sync Firefox on your phone or tablet 1. Open Firefox on your mobile device. 2. Go to the menu ( on iOS or on Android) and tap Sync and save data 3. Tap Ready to Scan and hold your phone over this code

There is "Sync now," but that is only syncing to the old laptop.

I logged out and back in on the new MacBook, and now it shows in Firefox on it and my iPhone (Connected Services), but now the old MacBook is no longer in the device list on either the new one or the phone.

It would be so much easier to just have an obvious "Add a device" button.

Thanks for any help you can offer.

pacoverin 于 1 周前提问

最后由 pacoverin 于 1 周前回复

Access to my sync account

Hello, I contact you because I would like to connect to another account for sync in another Firefox profile, but I forgot my password. I already tried "forgot password",… (了解更多)

Hello,

I contact you because I would like to connect to another account for sync in another Firefox profile, but I forgot my password. I already tried "forgot password", but I need the primary address from my account, that I forgot (And maybe I doesn't have it anymore...). But I have a secondary address that I added in my account in gmail, when I try to connect with this one, I'm redirected to the next step in the login process, and when I want to reset my password, I need my primary email, that I don't have it anymore. Then, I suppose my gmail address should be a secondary address in my account, is it possible to reset my password by sending my the code to this address ? Can you put my gmail address as my primary address ? My actual primary address for this account can be an address with protonmail (@protonmail.com/@proton.me/@pm.ne), but I don't have access anymore to these ones...

Thanks you David

Wabon 于 1 周前提问

Transfering to new computer

No security code is being sent to my email account. rlisterman@comcast.net So I'm unable to open VPN on my new computer. Why isn't this working??? … (了解更多)

No security code is being sent to my email account. rlisterman@comcast.net

So I'm unable to open VPN on my new computer.

Why isn't this working???

Bob 于 1 周前提问

Is there something wrong with the AI Chatbot feature today in Firefox

I have been trying to access the ChatGPT and others this morning and they dont seem to be working, i am unable to load a question and I do not see my history either. … (了解更多)

I have been trying to access the ChatGPT and others this morning and they dont seem to be working, i am unable to load a question and I do not see my history either.

Doc Holliday 于 1 周前提问

Firefox is not listed in Privacy&Security / Local Network

I am running Mac os 15.2 Sequoia. I installed firefox, but was not prompted to allow local Network Access. Firefox is not listed in Privacy&Security / Local Network. … (了解更多)

I am running Mac os 15.2 Sequoia. I installed firefox, but was not prompted to allow local Network Access. Firefox is not listed in Privacy&Security / Local Network. Firefox is very slow to load and cannot browse the net. Any soluton to add firefox to the list of apps to turn this feature on in Local Network?

shelski 于 1 周前提问

Signing into Google freezes Firefox. Every. Time.

Every single time I try to sign into Google, Firefox freezes after I type about 4 letters into the user name box. Hangs and I have to restart. Every. Time. I have to swit… (了解更多)

Every single time I try to sign into Google, Firefox freezes after I type about 4 letters into the user name box. Hangs and I have to restart. Every. Time. I have to switch over to Chrome to log into Google. It's a real pain in the butt. Anyone else having issues?

kate61 于 26 分钟前提问

Bluetooth Connection for Virtual Cycling Web Site

Hi! Firefox has been my default broser for many years. I recently started using Biketerra https://biketerra.com/ Whwn I try to start a ride I get the error message shown … (了解更多)

Hi! Firefox has been my default broser for many years. I recently started using Biketerra https://biketerra.com/ Whwn I try to start a ride I get the error message shown in the screen shot. 'Your Browser Does Not Support Bluetooth'

Version 133.0.3 (64-bit) Windows 10 Desktop PC Bluetooth Dongle

The browsers reccomended in the screenshot work without any issue.

Is this a known limitation of Firefox, or am I missing a setting somewhere? :-)

THANKS

v1sionmaster 于 6 天前提问

最后由 v1sionmaster 于 28 分钟前回复