See comment in gnu/build/icecat-extension.scm.

--- a/toolkit/mozapps/extensions/internal/XPIDatabase.jsm
+++ b/toolkit/mozapps/extensions/internal/XPIDatabase.jsm
@@ -3452,6 +3452,7 @@ const XPIDatabaseReconcile = {
     if (
       newAddon ||
       oldAddon.updateDate != xpiState.mtime ||
+      oldAddon.path != xpiState.path ||
       (aUpdateCompatibility && this.isAppBundledLocation(installLocation))
     ) {
       newAddon = this.updateMetadata(
@@ -3460,8 +3461,6 @@ const XPIDatabaseReconcile = {
         xpiState,
         newAddon
       );
-    } else if (oldAddon.path != xpiState.path) {
-      newAddon = this.updatePath(installLocation, oldAddon, xpiState);
     } else if (aUpdateCompatibility || aSchemaChange) {
       newAddon = this.updateCompatibility(
         installLocation,
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<tr><td><span title='2023-05-31 23:50:06 +0200'>2023-05-31</span></td><td><a href='/guix/commit/tests/gem.scm?id=654fcf9971bb01389d577be07c6ec0f68940c743'>tests: Use quasiquoted 'match' patterns for package sexps.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-05-31 23:25:26 +0200'>2023-05-31</span></td><td><a href='/guix/commit/tests/gem.scm?id=9e237fe0bd813664adf54599586df75b2e5b0998'>import: gem: Updater provides input list.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-05-31 23:25:26 +0200'>2023-05-31</span></td><td><a href='/guix/commit/tests/gem.scm?id=e6f82fcd5f8d8340f7f4f5ac5e476db8caaaeef1'>import: gem: Factorize "bundler" special case for name mapping.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-09-17 19:09:27 +0200'>2022-09-17</span></td><td><a href='/guix/commit/tests/gem.scm?id=5d22261db3d5099d745b9e8c8484545e546b319e'>import: gem: Support importing a specific version of a gem.</a><span class='msg-avail'>...</span></td><td>Taiju HIGASHI</td></tr>
<tr><td><span title='2021-07-20 23:43:29 +0200'>2021-07-20</span></td><td><a href='/guix/commit/tests/gem.scm?id=fa7db21f5973bf3de06ec6418d230b1969d479a1'>import: gem: Emit new-style package inputs.</a><span class='msg-avail'>...</span></td><td>Sarah Morgensen</td></tr>
<tr><td><span title='2020-04-27 23:29:40 +0200'>2020-04-27</span></td><td><a href='/guix/commit/tests/gem.scm?id=5dfe02c60767a633c67f7f6fc9557b54b3c99b63'>tests: Remove trailing commas in JSON tests.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>