I created a new profile with just the plasma integration extension and it worked, so I gradually copied over files from my profile into the testing one, restarting without and then with addons if plugins or searches werent working. I found prefs.js was the file causing the issue, so I made a profile with everything except it, and began configuring my settings, toolbars, extensions, etc to be identical to my normal profile, and making the few about:config tweaks I had for chrome.css capability and native file picker.
Here’s a diff of the pref.js files, but there are a lot of potential causes in here I’d imagine:
--- /home/laura/prefs working.js 2025-03-05 14:09:26.372597348 +0000
+++ "/home/laura/prefs not working.js" 2025-03-05 09:33:34.901129745 +0000
+user_pref("accessibility.typeaheadfind.enablesound", false);
+user_pref("browser.bookmarks.restore_default_bookmarks", false);
+user_pref("browser.download.autohideButton", true);
-user_pref("browser.download.viewableInternally.previousHandler.alwaysAskBeforeHandling.avif", true);
-user_pref("browser.download.viewableInternally.previousHandler.alwaysAskBeforeHandling.webp", true);
-user_pref("browser.download.viewableInternally.previousHandler.preferredAction.avif", 0);
-user_pref("browser.download.viewableInternally.previousHandler.preferredAction.webp", 0);
+user_pref("browser.download.panel.shown", true);
+user_pref("browser.download.save_converter_index", 1);
+user_pref("browser.eme.ui.firstContentShown", true);
+user_pref("browser.engagement.fxa-toolbar-menu-button.has-used", true);
+user_pref("browser.engagement.library-button.has-used", true);
-user_pref("browser.migration.version", 152);
-user_pref("browser.newtabpage.activity-stream.impressionId", "{ed6ea545-2b80-4dac-86a3-3abda0ebad13}");
+user_pref("browser.firefox-view.view-count", 4);
+user_pref("browser.formfill.enable", true);
+user_pref("browser.migration.version", 150);
+user_pref("browser.ml.chat.enabled", true);
+user_pref("browser.newtabpage.activity-stream.impressionId", "{3e22693c-8dd8-43d8-81b8-e0fe35f786d4}");
-user_pref("browser.newtabpage.activity-stream.showSearch", false);
+user_pref("browser.newtabpage.activity-stream.showSponsoredTopSites", true);
+user_pref("browser.newtabpage.blocked", "{\"T9nJot5PurhJSy8n038xGA==\":1,\"8D4M1N5DZ7Gaw9W7wpZD6A==\":1,\"ISLFZW2j2G13wI969IwCaA==\":1,\"vLr7abUlFrFzOlK3N9LUtw==\":1,\"vfARU0WcT6RHBL75SOnYBw==\":1,\"8BarPAteHsIDESMFsSm0vQ==\":1,\"JbBCv9WHtrZc8CgQTbINZA==\":1}");
+user_pref("browser.protections_panel.infoMessage.seen", true);
+user_pref("browser.safebrowsing.blockedURIs.enabled", true);
+user_pref("browser.safebrowsing.provider.google.gethashURL", "https://safebrowsing.google.com/safebrowsing/gethash?client=SAFEBROWSING_ID&appver=%MAJOR_VERSION%&pver=2.2");
+user_pref("browser.safebrowsing.provider.google.updateURL", "https://safebrowsing.google.com/safebrowsing/downloads?client=SAFEBROWSING_ID&appver=%MAJOR_VERSION%&pver=2.2&key=%GOOGLE_SAFEBROWSING_API_KEY%");
+user_pref("browser.safebrowsing.provider.google4.gethashURL", "https://safebrowsing.googleapis.com/v4/fullHashes:find?$ct=application/x-protobuf&key=%GOOGLE_SAFEBROWSING_API_KEY%&$httpMethod=POST");
+user_pref("browser.safebrowsing.provider.google4.updateURL", "https://safebrowsing.googleapis.com/v4/threatListUpdates:fetch?$ct=application/x-protobuf&key=%GOOGLE_SAFEBROWSING_API_KEY%&$httpMethod=POST");
-user_pref("browser.search.totalSearches", 2);
-user_pref("browser.sessionstore.upgradeBackup.latestBuildID", "20250305080132");
-user_pref("browser.shell.mostRecentDateSetAsDefault", "1741182594");
-user_pref("browser.startup.couldRestoreSession.count", 2);
+user_pref("browser.search.totalSearches", 101);
+user_pref("browser.search.widget.inNavBar", true);
+user_pref("browser.sessionstore.upgradeBackup.latestBuildID", "20250220081805");
+user_pref("browser.shell.mostRecentDateSetAsDefault", "1739372435");
+user_pref("browser.startup.couldRestoreSession.count", 1);
-user_pref("browser.translations.alwaysTranslateLanguages", "ja");
+user_pref("browser.translation.detectLanguage", false);
+user_pref("browser.translation.ui.show", false);
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-user_pref("privacy.clearOnShutdown_v2.cache", false);
-user_pref("privacy.clearOnShutdown_v2.cookiesAndStorage", false);
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-user_pref("privacy.sanitize.clearOnShutdown.hasMigratedToNewPrefs3", true);
-user_pref("privacy.sanitize.cpd.hasMigratedToNewPrefs2", true);
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+user_pref("widget.use-xdg-desktop-portal.settings", 1);
Hope this helps anyone with the same issue.
