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Can't access Wikipedia (and some other sites): “Secure Connection Failed”

Hello, everyone. My Firefox (v76.0.1, Windows 10 Pro 1909) can't access the English Wikipedia (en.wikipedia.org) and some other sites I need to work with. This started ha… (閱讀更多)

Hello, everyone. My Firefox (v76.0.1, Windows 10 Pro 1909) can't access the English Wikipedia (en.wikipedia.org) and some other sites I need to work with. This started happening suddenly Tuesday night.

This is the error (in English, since my Firefox is in Brazilian Portuguese):

Secure Connection Failed

An error occurred during a connection to en.wikipedia.org. PR_END_OF_FILE_ERROR

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.

Please contact the website owners to inform them of this problem.

upload.wikimedia.org gives me the same error. The bizarre thing is that Wikipedias in other languages seem to work normally. Other browsers work fine.

Searching it online, it doesn't seem to be a common problem, and it just started happening by itself. I don't remember installing anything on this PC that day. My only antivirus is Windows Defender. I don't use any VPNs.

Tried all solutions I could find on Google. So far I did:

  • Ctrl + F5
  • Edited the hosts file
  • Deleted cert8.db
  • Changed network proxy settings to No proxy and Automatically detect proxy configuration (was in Use system settings)
  • Toggled DNS over HTTPS
  • Went in about:config and toggled network.dns.disableIPv6
  • Started Firefox in Safe Mode
  • Backed up the profile folder and just let Firefox create a new one
  • Rebooted my router

None of that worked.

I work with site builder platforms and since yesterday the error is starting to creep up in those servers, too.

Any ideas? I just noticed that Wikipedia search is gone from the list of opensearch engines also… This is getting increasingly bizarre…

El Buga 於 2 年前 詢問

El Buga 於 2 年前 解答

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Send tab to devices feature not working

I am logged in with the same account both on my pc and mobile. When I try to send tab to my mobile, PC browser says sent but I don't see anything in my mobile browser. … (閱讀更多)

I am logged in with the same account both on my pc and mobile. When I try to send tab to my mobile, PC browser says sent but I don't see anything in my mobile browser.

Heman 於 2 年前 詢問

Heman 於 2 年前 解答

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Covert pop-up window to tab for only ONE pop-up window instead of all

I know there is a way to change the settings to force all pop-up windows to open as tabs, but is there a way to change this setting for a particular link that opens as a … (閱讀更多)

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simpleetrill 於 2 年前 詢問

Tommy 最近回覆 於 2 年前

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sync unexpected error

I am using tenfourfox on my iMac g4 and Firefox for Mac on my MacBook Pro. I wanted to use the sync so I could share book marks and things with My iMac g4. I made the acc… (閱讀更多)

I am using tenfourfox on my iMac g4 and Firefox for Mac on my MacBook Pro. I wanted to use the sync so I could share book marks and things with My iMac g4. I made the account on my Mac Book Pro and the went to sign in on My iMac g4. I entered my email then it came back with the unexpected error.

I looked at other posts from TenFourFox with those that had this error and they said it was on the sync side not software of TenFourFox.

Could you please help

Thank you

Alan

alapg1017 於 2 年前 詢問

alapg1017 最近回覆 於 2 年前

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confirm you're not a robot

I'd like to know why when I use Firefox often google asks me to show I am not a robot. Yes I use a VPN but this does't appear so often using Chrome. Thank you for any inf… (閱讀更多)

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Luciano 於 2 年前 詢問

Eve 於 2 年前 解答

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High CPU on macOS

I very much would like to switch away from Safari to Firefox, due to a number of reasons. However, I find Firefox has a much higher CPU demand and that's a killer for me.… (閱讀更多)

I very much would like to switch away from Safari to Firefox, due to a number of reasons. However, I find Firefox has a much higher CPU demand and that's a killer for me. Using latest version for all listed browsers in a MacBook Pro (i9, 16GB RAM), after opening CNN's website (also tried with other websites) and letting all browser just rest there, without interaction, I see this (CPU):

Firefox: 49.5% WindowServer: 26.4% Google Chrome: 16.1% Safari: 5.8% kernel_task: 4.6% (https://cln.sh/TQhV)

Is this normal or expected? (Firefox version is 76.0.1)

Miguel 於 2 年前 詢問

Eve 最近回覆 於 2 年前

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Installing firefox on a Windows 10 64 bit machine

For 3 days I have been trying to install Firefox. Firefox dowloads and starts installing. I have set Firefox as my default browser and turned off antivirus to not inter… (閱讀更多)

For 3 days I have been trying to install Firefox. Firefox dowloads and starts installing. I have set Firefox as my default browser and turned off antivirus to not interfere with the install. It appears to install and then gives an error message that the address of the download file is incorrect (see attached JPG). I sometimes get a message about a file being corrupted (roughly one time in each five tries) also shown in the JPG. I have tried clean installs at least a dozen times (delete the programfiles/mozilla node and then do a fresh download. After clicking download have selected both run and save multiple times. I always get the error message about a bad address. Any help would be greatly apprediated. Thanks.

LorenGL 於 2 年前 詢問

Scribe 最近回覆 於 2 年前

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You Tube won't play

When I connect to a YouTube video all I get is a spinning circle. I can download the video if I connect to the internet via Internet Explorer. This make me think the prob… (閱讀更多)

When I connect to a YouTube video all I get is a spinning circle. I can download the video if I connect to the internet via Internet Explorer. This make me think the problem isn't with my computer. any recommendations how to fix this?

PS. I'm not an knowledgeable computer user so try to keep it simple.

Thanks

Tom Weaver 於 2 年前 詢問

Andrew 於 2 年前 解答

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Apparently, Firefox 71 for Mac no longer allows tabs be dragged within a browser window to reposition them. Is there a way to fix this? Am I missing a setting?

Formerly, one could reorder tabs in a Firefox browser window by clicking and dragging. One could also click and hold a tab and move it to create a new window or take a ta… (閱讀更多)

Formerly, one could reorder tabs in a Firefox browser window by clicking and dragging. One could also click and hold a tab and move it to create a new window or take a tab from one window, click and drag it to another window. I am no longer able to do this on my Mac laptop, after updating to Firefox 71. I can't seem to find a special setting in Firefox 71. Is there one or a way to allow tab movement? Or do I need to revert to the previous version of Firefox?

sshopkow 於 2 年前 詢問

Ankit Kumar 最近回覆 於 2 年前

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BT Mail

When I try and log into BT Mail it comes back with invalid password. The password is saved. This only started happening today (22/5/2020) - its been working perfectly up … (閱讀更多)

When I try and log into BT Mail it comes back with invalid password. The password is saved. This only started happening today (22/5/2020) - its been working perfectly up to now. I did not want to change my password and experimented with my other access methods - IOS on my Ipad and Iphone works perfectly, likewise if I entered via Safari works fine only Firefox comes back with the block - what has changed. I have tried entering the password manually and cleared all cache but still no joy ? //Andy

andy.veitch 於 2 年前 詢問

Ankit Kumar 最近回覆 於 2 年前

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change solid colors on custom theme search and address bar to white

i had 2 versions of firefox on my desktop, so i deleted the older version....wrong. it was the one that had all of my bookmarks, themes, and plugins, so i had to start a… (閱讀更多)

i had 2 versions of firefox on my desktop, so i deleted the older version....wrong. it was the one that had all of my bookmarks, themes, and plugins, so i had to start all over. i got most of them back on but now when i get to my browser with my customized theme, the whole top is solid even though the screenshot of the theme i downloaded shows the address space and search space to be white. the tabs lines are also hard to see. if i remember right from quite a while ago, i had to change something in about:config to get the address bar and search bar to be white and for the tabs to be a different color than the rest of the toolbar. i'm using 76.0.1 (64 bit). see screenshot below

rranger9 於 2 年前 詢問

rranger9 最近回覆 於 2 年前

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saved logins

I uninstalled Firefox and deleted the folder from a computer I was going to give away, then I reinstalled Firefox. Now none of my computers has any saved logins or websit… (閱讀更多)

I uninstalled Firefox and deleted the folder from a computer I was going to give away, then I reinstalled Firefox. Now none of my computers has any saved logins or website links.

Davidov 於 2 年前 詢問

Davidov 最近回覆 於 2 年前

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BT Mail Log in

Hi, Simce the upgrade to the newest version, Firefox won’t allow me to log in to BT Mail, the website giving me an “incorrect password” message. It works perfectly on all… (閱讀更多)

Hi, Simce the upgrade to the newest version, Firefox won’t allow me to log in to BT Mail, the website giving me an “incorrect password” message. It works perfectly on all other browsers, so isn’t a problem with my password or with BT. I’ve done all the usual clearing of cache, cookies etc, but no joy. A quick google showed other people having the same problem with Firefox/BT Mail in the last few weeks. Is this a known issue? I really don’t want to move away from Firefox, but this is a problem! Thanks.

andycdesign 於 2 年前 詢問

andycdesign 最近回覆 於 2 年前

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Custom hotkeys.

I've just switched to Firefox from Chrome and need to change some of the hotkeys to a more familiar setup. Also, another annoying thing I noticed, `cmd+b` opens up the Bo… (閱讀更多)

I've just switched to Firefox from Chrome and need to change some of the hotkeys to a more familiar setup.

Also, another annoying thing I noticed, `cmd+b` opens up the Bookmarks sidebar, rather than bolden the text on a WYSIWYG editor on websites (i've installed FF v76.0.1 (64-bit) on MacOS).

pr11 於 2 年前 詢問

jscher2000 - Support Volunteer 於 2 年前 解答

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Going to YouTube with Firefox, it will redirect me from the Home page, to a random suscription page.

Each time I go to YouTube, with Firefox, it will redirect me from the Home page to a random subscription channel. If I click on Home, it will not remain there, but redire… (閱讀更多)

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David Florence 於 2 年前 詢問

McCoy 於 2 年前 解答

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Set Blank Placeholders for Top Sites on New Tab Page?

Hi Is it possible to set placeholders for the Top Sites that I can define the links myself rather than pulling them from the most visited sites I've visited? I want to h… (閱讀更多)

Hi

Is it possible to set placeholders for the Top Sites that I can define the links myself rather than pulling them from the most visited sites I've visited?

I want to hold 8 Top Links on my New Tab page but I want them to be initially blank in other words they don't go anywhere I till I click edit button.

Is this possible? Is there a way of separating the most visited sites from Top Sites buttons? Is there a way to blank all of the Top Site buttons without clearing my entire browser history?

Many thanks

willowen100 於 2 年前 詢問

cor-el 於 2 年前 解答

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Firefox will not let me stay logged in to my ATT Yahoo mail account.

Firefox will not let me stay logged in to my ATT Yahoo mail account. I am required to log in every time I launch Firefox. When I log in I always check the box that lets… (閱讀更多)

Firefox will not let me stay logged in to my ATT Yahoo mail account. I am required to log in every time I launch Firefox. When I log in I always check the box that lets me remian logged in for two weeks but it does not work and I have to log in every time I launch Firefox. This seems to have happened after the last update. I did a complete uninstall and reinstall of Firefox - no improvement. MS Edge will let me remain logged in with no problem. I prefer to remain with my faithful Firefox and hope someone can recommend a fix. Thanks.

bob.jan.sutton 於 2 年前 詢問

Democracy_Itself 最近回覆 於 2 年前

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default programs changed

how is my default pdf program changing; others can get in to change it from Foxit to WPS . It comes up in a mini widow below to open with WPS for a pdf file. Who allo… (閱讀更多)

how is my default pdf program changing; others can get in to change it from Foxit to WPS . It comes up in a mini widow below to open with WPS for a pdf file. Who allows this to be changed when I select my default pdf viewer ?

ThaiED 於 2 年前 詢問

jscher2000 - Support Volunteer 最近回覆 於 2 年前