Hi

What happens when you try to bookmark a page? Is there any error message?

it shows error picture attached

Do you have any add-ons installed in Firefox?

What is the security software mentioned in the error message?

how to check those add ons

i have no idea about these add ons

This support article should help:

https://support.mozilla.org/en-US/kb/find-and-install-add-ons-add-features-to-firefox#w_viewing-and-managing-your-installed-add-ons

The second infobar in your screenshot mentions the error that forms the title of the following article. But before taking any drastic action, I have an initial suggestion:

(1) Article: Fix "The bookmarks and history system will not be functional" error message

(2) Integrity check/repair

First, if you haven't already, please do a normal shutdown and/or restart of your system. Restarting Windows can help by freeing up locked files, completing any deferred updates, and resolving temporary file permission issues.

Next, if Firefox still has bookmark problems, could you let us know what you get when you run the "Verify Integrity" diagnosis and repair function. That's here:

Open Firefox's Troubleshooting Information page using any of these methods:

• "3-bar" menu button > Help > More Troubleshooting Information
• (menu bar) Help > More Troubleshooting Information
• type or paste about:support in the address bar and press Enter

Near the bottom, there is a section titled Places Database -- that's the file which stores history and bookmarks. Click the button labeled Verify Integrity. There may be a 10-15 second delay before results appear.

If all is well, the report that appears below the button should start with:

> Task: checkIntegrity
+ The places.sqlite database is sane
+ The favicons.sqlite database is sane
> Task: invalidateCaches
+ The caches have been invalidated
> Task: checkCoherence
+ The database is coherent

Does yours say both databases are "sane" or something else? You can select and copy the report, and then paste it into a reply for review and comment.

see the attached picture

Application Basics Name Version Build ID Distribution ID Update Folder Update History Update Channel User Agent OS OS Theme Application Binary Profile Folder Build Configuration about:buildconfig Memory Use about:memory Performance about:processes Registered Service Workers about:serviceworkers Third-party Modules about:third-party Launcher Process Multiprocess Windows Fission Windows Remote Processes Enterprise Policies Google Location Service Key Google Safebrowsing Key Mozilla Location Service Key Safe Mode Memory Size (RAM) Disk Space Available Profiles about:profiles Pointing Devices Crash Reports Report ID Submitted Remote Features Name Status Remote Processes Type Count Add-ons Name Type Version Enabled Location ID Security Software Type Name Antivirus Antispyware Firewall Legacy User Stylesheets Active Stylesheets Graphics Features GPU #1 GPU #2 Diagnostics Decision Log Crash Guard Disabled Features Workarounds Failure Log Media Output Devices Name Group Vendor State Preferred Format Channels Rate Latency Input Devices Name Group Vendor State Preferred Format Channels Rate Latency Media Capabilities Content Decryption Modules Information Key System Name Video Robustness Audio Robustness Capabilities Clear Lead HDCP 2.2 Compatible Environment Variables Name Value Remote Settings Status OK Not working Last check Local timestamp History Status Date Infos Remote Experiments Name Experiment Branch

See about:studies for more information, including how to disable individual experiments or to disable Firefox from running this type of experiment in the future. Important Modified Preferences Name Value Important Locked Preferences Name Value Places Database Integrity Statistics Entity Count Size (KiB) Size (%) Efficiency (%) Sequentiality (%) Accessibility Activated Prevent Accessibility Accessibility Instantiator Library Versions Sandbox Startup Cache Disk Cache Path Ignore Disk Cache Found Disk Cache on Init Wrote to Disk Cache Internationalization & Localization Application Settings Requested Locales Available Locales App Locales Regional Preferences Default Locale Operating System System Locales Regional Preferences Remote Debugging (Chromium Protocol) Accepting Connections URL Printing Troubleshooting Modified print settings Name Value Content Analysis (DLP) Active Connected to Agent Agent Path Agent Failed Signature Verification Request Count

Sorry, did you get a report when you clicked Verify Integrity? It may take 15 seconds to appear below the button.

no report

Do you still see the error bar up in your toolbar section for this:

Fix "The bookmarks and history system will not be functional" error message

If so, I think you need to proceed with the steps in that article.