I do not know if the hosted api allows connections that are not https. It looks like the url redirects so its hard to test but the response did come back as accepting https: http://mxtoolbox.com/SuperTool.aspx?action=a%3aajax.googl... Since it does, you might be able to force it with an add on. Maybe something like noscript to block the https:// site.

Similar previous thread you probably already saw: https://support.mozilla.org/questions/1073172

What web server are you using on localhost?

I like the above suggestion to block scripts from that domain if that is your goal. You can use YesScript if it's a one-off; NoScript requires a lot of training.

https://addons.mozilla.org/firefox/addon/yesscript/

guigs said

I do not know if the hosted api allows connections that are not https. It looks like the url redirects so its hard to test but the response did come back as accepting https: http://mxtoolbox.com/SuperTool.aspx?action=a%3aajax.googl... Since it does, you might be able to force it with an add on. Maybe something like noscript to block the https:// site.

I don't want to block the "https" site, I want to connect it with a self-signed certification. When connect to a site which is not marked as "HSTS", I can add an exception to the firefox's certification manager. If the site uses "HSTS" (such as "ajax.googleapis.com"), the exception does not work, that's why I want to close "HSTS".

jscher2000 said

Similar previous thread you probably already saw: https://support.mozilla.org/questions/1073172 What web server are you using on localhost? I like the above suggestion to block scripts from that domain if that is your goal. You can use YesScript if it's a one-off; NoScript requires a lot of training. https://addons.mozilla.org/firefox/addon/yesscript/

Yes I have saw that and tried, but it's not helpful. You can see the above reply that I don't want to block the site. The web server is apache, but I think it's not important, firefox close the connection before the page's content returns.

I know for chrome you can edit "transport_security_state_static.json" file to manage the HSTS list. Is there a similar file for firefox?

The HSTS flags are stored in the permissions.sqlite database, which is not easily editable. See https://support.mozilla.org/questions/984794#answer-528146 about using the SQLite Manager extension to clear them, but of course, they could be reset.

Do you use the Apache server for anything else? Are there any applications that might have sent a strict transport security header? If so, the problem is likely to recur.

jscher2000 said

The HSTS flags are stored in the permissions.sqlite database, which is not easily editable. See https://support.mozilla.org/questions/984794#answer-528146 about using the SQLite Manager extension to clear them, but of course, they could be reset. Do you use the Apache server for anything else? Are there any applications that might have sent a strict transport security header? If so, the problem is likely to recur.

Unfortunately nothing like %googleapis% found in permissions.sqlite/moz_hosts table.

I guess firefox uses a hard-coded list for some important sites.

Finally I find a solution: 1. backup xul.dll to xul.bak 2. use a hex editor to open xul.dll 3. search "googleapis.com" and change it to something else

Omg, that is getting worse.

I run a local mirror of ajax.googleapis.com, it's my choice, not yours, no? You take me this choice and leave me with a crappy solution.

So now, I have to edit a .dll after each update? Please, give us the option in about:config to disable HSTS.

JoeBauers said

So now, I have to edit a .dll after each update? Please, give us the option in about:config to disable HSTS.

I searched for such a thing and the closest preference I saw was network.stricttransportsecurity.preloadlist which the original post said toggling from true to false did not help.