Hi Harley, Firefox View works like a toolbar button, so it could be mixed in with the other available buttons on the Customize screen. This article will get you in there -- can you find it and drag it where you want it?

Customize Firefox controls, buttons and toolbars

Unfortunately, it is also not there.

Hi

Are you using the version in the Arch repo, or are you using the tarball, snap or flatpak versions that are provided by Mozilla?

I am using the version in the Arch repo. I have it installed the same way on another PC, and Firefox View works correctly on that PC, however not on this one.

Can you try one of the Mozilla builds? It may be the case that the maintainer of the Arch build has not included the new feature in their package.

Well as I said the feature is enabled just fine on another Arch PC using the same package. But I can try one of mozilla's builds to see if anything changes, anyway!

The flatpak version also does not have Firefox View for me.

Do you have firefox-view pref on the about:config page?

• browser.tabs.firefox-view

You can also check the browser.uiCustomization.state pref to see whether that has the firefox-view-button under the "TabsToolbar" key.

• https://support.mozilla.org/en-US/kb/about-config-editor-firefox

Do you have firefox-view pref on the about:config page?

• browser.tabs.firefox-view

Yes, it is there and set to true.

You can also check the browser.uiCustomization.state pref to see whether that has the firefox-view-button under the "TabsToolbar" key.

• https://support.mozilla.org/en-US/kb/about-config-editor-firefox

firefox-view-button is within that key as well.

The JSON is hard to read, but if you work your ways backwards from "firefox-view-button" to the previous left bracket ([), which toolbar is listed to the left of it? For example:

• "toolbar-menubar" (optional menu bar)
• "TabsToolbar" (tabs bar)
• "nav-bar" (main toolbar)
• "PersonalToolbar" (Bookmarks Toolbar)
• "widget-overflow-fixed-list" (pinned to overflow)
• something else?

You can try "Clear the startup cache..." via the "Help -> More Troubleshooting Information" (about:support) page.

• https://support.mozilla.org/en-US/kb/use-troubleshooting-information-page-fix-firefox

The JSON is hard to read, but if you work your ways backwards from "firefox-view-button" to the previous left bracket ([), which toolbar is listed to the left of it? For example:

• "toolbar-menubar" (optional menu bar)
• "TabsToolbar" (tabs bar)
• "nav-bar" (main toolbar)
• "PersonalToolbar" (Bookmarks Toolbar)
• "widget-overflow-fixed-list" (pinned to overflow)
• something else?

"toolbar-menubar":["menubar-items"],"TabsToolbar":["firefox-view-button","tabbrowser-tabs","new-tab-button","alltabs-button"]

You can try "Clear the startup cache..." via the "Help -> More Troubleshooting Information" (about:support) page.

• https://support.mozilla.org/en-US/kb/use-troubleshooting-information-page-fix-firefox

Unfortunately, this did not work.

"TabsToolbar":["firefox-view-button"] would indicate that the Firefox View button should be positioned on the Tab bar.

You can create a new profile as a quick test to see if your current profile is causing the problem.

See "Creating a profile":

• https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.

• https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile

"TabsToolbar":["firefox-view-button"] would indicate that the Firefox View button should be positioned on the Tab bar. You can create a new profile as a quick test to see if your current profile is causing the problem. See "Creating a profile":

• https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.

• https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile

Creating a new profile did work. I should be able to copy the data over, so I'm going to attempt that now.