This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

new install, all search engines blocked, why?

more options

New installation, all <strike>passwords</strike> search engines blocked. All said bad certificate, connection not safe. Seems to be some interaction with Kaspersky AV. When I enabled Kaspersky protection, problem went away. Is this how things should work?

New installation, all <strike>passwords</strike> search engines blocked. All said bad certificate, connection not safe. Seems to be some interaction with Kaspersky AV. When I enabled Kaspersky protection, problem went away. Is this how things should work?

Modified by cor-el

Chosen solution

If you install Kaspersky first, then Firefox, I think Kaspersky does not set up Firefox to trust it as a "man in the middle" reading all your web requests. That might happen automatically if you do a normal Windows shutdown and restart, or there may be a feature in Kaspersky to trigger it, or you can manually set up Firefox to trust Kaspersky, although this seldom appears to be necessary.

Read this answer in context 👍 0

All Replies (3)

more options

edit: should have said all search engines blocked, not passwords. Don't know how I messed that one up.

more options
more options

Chosen Solution

If you install Kaspersky first, then Firefox, I think Kaspersky does not set up Firefox to trust it as a "man in the middle" reading all your web requests. That might happen automatically if you do a normal Windows shutdown and restart, or there may be a feature in Kaspersky to trigger it, or you can manually set up Firefox to trust Kaspersky, although this seldom appears to be necessary.