Cannot install any add-ons or themes: "Download failed. Please check your connection."
Hi,
I cannot download & installed any add-ons or themes. After clicking the install button, I always get a red bar saying "Download failed. Please check your connection.". This happens on Firefox, Firefox beta and Firefox nightly.
I did some googling and found similar posts from a few years ago. These seem to suggest I don't have the correct certificate used to verify extension signatures:
- https://support.mozilla.org/en-US/questions/1257997
- https://support.mozilla.org/bm/questions/1258023
I checked my certificates and I don't have anything from "Mozilla Corporation - signingca1.addons.mozilla.org" (there's a screenshot of this cert in the first forum link above), so I think this is indeed the issue? I've attached a screenshot of my cert list where the Mozilla cert should be.
Please note I am on an M3 Pro macbook pro. It's a work laptop and I thought maybe our network settings were interfering with things, but my previous work laptop (Intel) could install add-ons just fine.
Would appreciate some help!
P.S. I found a workaround where I copied over all extension JSON and XPI files from my old laptop. So I am using my previous extensions just fine but still cannot download any new ones. Also I don't have access to my old laptop anymore so can't copy over any new ones.
所有回覆 (10)
If you right-click (or Ctrl+click) the blue button and click Save Link As, can you get a more informative error message? You also could check the Browser Console (Command+Option+J) to see whether there is an error with the CDN redirect or some kind of block.
Note that you posted with a Nightly build, does this also happen with the current release?
You can create a new profile as a quick test to see if your current profile is causing the problem.
See "Creating a profile":
If the new profile works, you can transfer files from a previously used profile to the new profile, but be careful not to copy corrupted files to avoid carrying over problems.
jscher2000 - Support Volunteer said
If you right-click (or Ctrl+click) the blue button and click Save Link As, can you get a more informative error message? You also could check the Browser Console (Command+Option+J) to see whether there is an error with the CDN redirect or some kind of block.
- "Save Link As" downloads the extension as an xpi file to my Downloads folder, so that seems ok?
- On the dev tools network tab, I can only see GET requests to googleanalytics when I click the blue button
cor-el said
Note that you posted with a Nightly build, does this also happen with the current release? You can create a new profile as a quick test to see if your current profile is causing the problem. See "Creating a profile": If the new profile works, you can transfer files from a previously used profile to the new profile, but be careful not to copy corrupted files to avoid carrying over problems.
It happens on a brand new profile. I've updated Nightly a couple of times in the past 2 days already.
yusufmahtab12 said
jscher2000 - Support Volunteer said
If you right-click (or Ctrl+click) the blue button and click Save Link As, can you get a more informative error message? You also could check the Browser Console (Command+Option+J) to see whether there is an error with the CDN redirect or some kind of block.
- "Save Link As" downloads the extension as an xpi file to my Downloads folder, so that seems ok?
- On the dev tools network tab, I can only see GET requests to googleanalytics when I click the blue button
Thank you for testing. #1 sounds good. For #2, the retrieval probably won't appear in a given tab's Network list, you would need to enable network logging in the Browser Console (gear icon at the right end of that window's filter bar).
yusufmahtab12 said
It's a work laptop
Do you see any active policies if you visit about:policies in the address bar?
Are you able to install the downloaded xpi manually?
Hi both, thanks for your help so far. I realised that our company is using Netskope to control traffic on our laptops and addons.mozilla.org (or something similar) wasn't allowlisted. I asked for it to be added but the response was that Firefox has some security issues (I'm not sure what exactly) and it's not a supported browser for us, so unfortunately I'm going to have to use Google Chrome.
I also checked my personal PC and addons can be downloaded there without any issues. It also doesn't have the Mozilla certificate I mentioned in the original post. At this point I'm confident the issue is due to the company's network configuration.
由 yusufmahtab12 於 修改
Well, that's frustrating!
If they do not block or prohibit extensions in Firefox but merely block the Add-ons website, then you can always download the extension elsewhere to a removable USB device and install the extension locally.
Did you try manually installing the extension xpi file like I mentioned?