When you update Firefox, it automatically checks your add-ons and updates them to compatible versions when possible. If an add-on can’t be updated and is no longer compatible, Firefox turns it off. This article shows you how to update those add-ons and get them working again.

The Firefox add-ons might not work if your Firefox browser is not up to date. Moreover, incorrect date/time settings of your system or corrupt Firefox user profile (or any of its settings/files) may also cause the issue. … Moreover, make sure the addons are activated in the addons menu of . . . Read more

Open your Mozilla Firefox browser and click on the "Tools" menu and click on "Add-ons". Click on the "Extensions" tab. Click on the add-on you want to enable and click "Enable." Restart your browser so the changes take effect.

If you decide that you want to unblock a previously blocked site, do the following: Click ? Click Add-ons. Find Block Site. Click Options or Preferences. Scroll down to your list of blocked sites and find the site that you want to unblock. Click X to the right of the . . . Read more

SOLUTION!: Go to chrome://flags in URL bar, search for extensions, DISABLE "Extensions MENU". Then relaunch chrome and it goes back to the old extensions toolbar! Can now see all extensions in toolbar & in menu (3 dots), & rearrange them.

Click the Extensions folder to highlight it, right-click and click "Copy." Navigate up one level to Profiles, and then choose your current profile directory. Right-click and select "Paste" to recover your extensions by copying them from your old Firefox profile.

To turn add-ons on Open Internet Explorer, select the Tools button , and then select Manage add-ons. Under Show, select All add-ons. Select the add-on, Enable, and then select Close.

On the left side of the Windows Firewall panel, click Allow a program or feature through Windows Firewall. The Windows Firewall Settings window will appear. Find Mozilla Firefox (or firefox.exe) in the list of programs. If it is there, click to select it.

Add websites to your Allow list Go to the site you want to add to your Allow list. Tap the shield icon next to the address bar. Tap the switch next to Enhanced Tracking Protection to turn off protection for that site.

Open Firefox. In Firefox, click Tools and click Add-ons. In the Add-ons window, you can view all installed add-ons, and customize them. To visit the add-ons page, click the Get Extensions link in the bottom-right corner.