diff --git a/devtools/client/webconsole/test/browser/_webconsole.ini b/devtools/client/webconsole/test/browser/_webconsole.ini
index 0e2e7516eaed..e1075eb76946 100644
--- a/devtools/client/webconsole/test/browser/_webconsole.ini
+++ b/devtools/client/webconsole/test/browser/_webconsole.ini
@@ -386,4 +386,3 @@ skip-if = fission # Bug 1578594
 [browser_webconsole_worker_evaluate.js]
 [browser_webconsole_worker_promise_error.js]
 [browser_webconsole_worklet_error.js]
-skip-if = fission #Bug 1580565
diff --git a/dom/base/test/browser.ini b/dom/base/test/browser.ini
index 22abd05c5097..4dd02fde4db8 100644
--- a/dom/base/test/browser.ini
+++ b/dom/base/test/browser.ini
@@ -59,7 +59,7 @@ skip-if = e10s # this tests non-e10s behavior. it's not expected to work in e10s
 [browser_state_notifications.js]
 skip-if = true # Bug 1271028
 [browser_use_counters.js]
-skip-if = verify || fission #bug 1580565
+skip-if = verify
 [browser_timeout_throttling_with_audio_playback.js]
 skip-if = (os == "win" && processor == "aarch64") # aarch64 due to bug 1536566
 [browser_bug1303838.js]
diff --git a/dom/security/test/mixedcontentblocker/mochitest.ini b/dom/security/test/mixedcontentblocker/mochitest.ini
index 74ac96862feb..afbc85272099 100644
--- a/dom/security/test/mixedcontentblocker/mochitest.ini
+++ b/dom/security/test/mixedcontentblocker/mochitest.ini
@@ -23,7 +23,6 @@ support-files =
 [test_main.html]
 skip-if =
   (toolkit == 'android') || webrender || (verify && !debug && (os == 'linux')) || # Android: TIMED_OUT; bug 1402554
-  fission || #Bug 1580771, object did not follow block_active_content pref #Crashes intermittently: @ mozilla::dom::BrowsingContext::CreateFromIPC(mozilla::dom::BrowsingContext::IPCInitializer&&, mozilla::dom::BrowsingContextGroup*, mozilla::dom::ContentParent*)
   tsan # Times out / Memory consumption, bug 1612707
 [test_bug803225.html]
 skip-if = (os=='linux' && bits==32) || headless || tsan # Linux32:bug 1324870; Headless:bug 1405870; tsan:bug 1612707
diff --git a/toolkit/components/url-classifier/tests/mochitest/mochitest.ini b/toolkit/components/url-classifier/tests/mochitest/mochitest.ini
index a5d84d6f8500..17fb2b2bc051 100644
--- a/toolkit/components/url-classifier/tests/mochitest/mochitest.ini
+++ b/toolkit/components/url-classifier/tests/mochitest/mochitest.ini
@@ -41,7 +41,6 @@ skip-if = (os == 'linux' && debug) #Bug 1199778
 [test_classifier_match.html]
 [test_classifier_worker.html]
 [test_classify_by_default.html]
-skip-if = fission && debug # Crashes intermittently: @ mozilla::dom::BrowsingContext::CreateFromIPC(mozilla::dom::BrowsingContext::IPCInitializer&&, mozilla::dom::BrowsingContextGroup*, mozilla::dom::ContentParent*)
 [test_classify_ping.html]
 skip-if = (verify && debug && (os == 'win' || os == 'mac'))
 [test_classify_track.html]